netlink: specs: explicitly declare block scalar strings

In YAML, it is allowed to declare a scalar strings at the next lines
without explicitly declaring them as a block. Yet, they looks weird, and
can cause issues when ':' or '#' are present.

The modified lines didn't have issues with the special characters, but
it seems better to explicitly declare such blocks as scalar strings to
encourage people to "properly" declare future scalar strings.

The right angle bracket is used with a minus sign to indicate that the
folded style should be used without adding extra newlines. By doing
that, the output is not changed compared to what was done before this
patch.

Suggested-by: Donald Hunter <[e-mail]>
Signed-off-by: Matthieu Baerts (NGI0) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/netlink/specs/conntrack.yaml

···
 protocol: netlink-raw
 protonum: 12
 
-doc:
+doc: >-
   Netfilter connection tracking subsystem over nfnetlink
 
 definitions:

Documentation/netlink/specs/netdev.yaml

···
 ---
 name: netdev
 
-doc:
+doc: >-
   netdev configuration over generic netlink.
 
 definitions:
···
     entries:
       -
         name: basic
-        doc:
+        doc: >-
           XDP features set supported by all drivers
           (XDP_ABORTED, XDP_DROP, XDP_PASS, XDP_TX)
       -
         name: redirect
-        doc:
+        doc: >-
           The netdev supports XDP_REDIRECT
       -
         name: ndo-xmit
-        doc:
+        doc: >-
           This feature informs if netdev implements ndo_xdp_xmit callback.
       -
         name: xsk-zerocopy
-        doc:
+        doc: >-
           This feature informs if netdev supports AF_XDP in zero copy mode.
       -
         name: hw-offload
-        doc:
+        doc: >-
           This feature informs if netdev supports XDP hw offloading.
       -
         name: rx-sg
-        doc:
+        doc: >-
           This feature informs if netdev implements non-linear XDP buffer
           support in the driver napi callback.
       -
         name: ndo-xmit-sg
-        doc:
+        doc: >-
           This feature informs if netdev implements non-linear XDP buffer
           support in ndo_xdp_xmit callback.
   -
···
     entries:
       -
         name: tx-timestamp
-        doc:
+        doc: >-
           HW timestamping egress packets is supported by the driver.
       -
         name: tx-checksum
-        doc:
+        doc: >-
           L3 checksum HW offload is supported by the driver.
       -
         name: tx-launch-time-fifo
-        doc:
+        doc: >-
           Launch time HW offload is supported by the driver.
   -
     name: queue-type

Documentation/netlink/specs/nftables.yaml

···
 protocol: netlink-raw
 protonum: 12
 
-doc:
+doc: >-
   Netfilter nftables configuration over netlink.
 
 definitions:

Documentation/netlink/specs/nl80211.yaml

···
 name: nl80211
 protocol: genetlink-legacy
 
-doc:
+doc: >-
   Netlink API for 802.11 wireless devices
 
 definitions:

Documentation/netlink/specs/ovs_datapath.yaml

···
 protocol: genetlink-legacy
 uapi-header: linux/openvswitch.h
 
-doc:
+doc: >-
   OVS datapath configuration over generic netlink.
 
 definitions:

Documentation/netlink/specs/ovs_flow.yaml

···
 protocol: genetlink-legacy
 uapi-header: linux/openvswitch.h
 
-doc:
+doc: >-
   OVS flow configuration over generic netlink.
 
 definitions:

Documentation/netlink/specs/ovs_vport.yaml

···
 protocol: genetlink-legacy
 uapi-header: linux/openvswitch.h
 
-doc:
+doc: >-
   OVS vport configuration over generic netlink.
 
 definitions:

Documentation/netlink/specs/rt-addr.yaml

···
 uapi-header: linux/rtnetlink.h
 protonum: 0
 
-doc:
+doc: >-
   Address configuration over rtnetlink.
 
 definitions:

Documentation/netlink/specs/rt-link.yaml

···
 uapi-header: linux/rtnetlink.h
 protonum: 0
 
-doc:
+doc: >-
   Link configuration over rtnetlink.
 
 definitions:

Documentation/netlink/specs/rt-neigh.yaml

···
 uapi-header: linux/rtnetlink.h
 protonum: 0
 
-doc:
+doc: >-
   IP neighbour management over rtnetlink.
 
 definitions:

Documentation/netlink/specs/rt-route.yaml

···
 uapi-header: linux/rtnetlink.h
 protonum: 0
 
-doc:
+doc: >-
   Route configuration over rtnetlink.
 
 definitions:

Documentation/netlink/specs/rt-rule.yaml

···
 uapi-header: linux/fib_rules.h
 protonum: 0
 
-doc:
+doc: >-
   FIB rule management over rtnetlink.
 
 definitions:

Documentation/netlink/specs/tc.yaml

···
 uapi-header: linux/pkt_cls.h
 protonum: 0
 
-doc:
+doc: >-
   Netlink raw family for tc qdisc, chain, class and filter configuration
   over rtnetlink.