ci(s): fix github mirror

Due to a botched copy-paste job, we were accidentally trying to push
PacketMix instead of sprinkles here. Oops

.tangled/workflows/github.yml

···
     command: |
       cd ..
       git clone https://git.freshlybakedca.ke/patisserie.git:workspace=projects/sprinkles.git
-      cd packetmix
+      cd sprinkles
       git remote add github [e-mail]:FreshlyBakedCake/Sprinkles.git
       git fetch github
       git push github origin/release:refs/heads/release