treewide: bump to v1.9.0-alpha

Signed-off-by: oppiliappan <[e-mail]>

docs/migrations.md

···
 
 ## Upgrading from v1.8.x
 
-After v1.8.2, the HTTP API for knots has been deprecated and
-replaced with XRPC. Repositories on outdated knots will not
-be viewable from the appview. Upgrading is straightforward:
+After v1.8.2, the HTTP API for knot and spindles have been
+deprecated and replaced with XRPC. Repositories on outdated
+knots will not be viewable from the appview. Upgrading is
+straightforward however.
+
+For knots:
 
 - Upgrade to latest tag (v1.9.0 or above)
 - Head to the [knot dashboard](https://tangled.sh/knots) and
   hit the "retry" button to verify your knot
+
+For spindles:
+
+- Upgrade to latest tag (v1.9.0 or above)
+- Head to the [spindle
+  dashboard](https://tangled.sh/spindles) and hit the
+  "retry" button to verify your spindle
 
 ## Upgrading from v1.7.x
 

nix/pkgs/knot-unwrapped.nix

···
   sqlite-lib,
   src,
 }: let
-  version = "1.8.1-alpha";
+  version = "1.9.0-alpha";
 in
   buildGoApplication {
     pname = "knot";
-    version = "1.8.1";
-    inherit src modules;
+    inherit src version modules;
 
     doCheck = false;