ci: fix buf action

Signed-off-by: Roman Dmytrenko <rdmytrenko@gmail.com>

Author: erka

.github/workflows/proto-push.yml

@@ -1,9 +1,13 @@
 name: Proto Push
 on:
+  pull_request:
+  workflow_dispatch:
   push:
     tags:
       - "v2*"
 
+permissions:
+  contents: read
 jobs:
   proto-push:
     name: "Push Protos"
@@ -14,7 +18,6 @@ jobs:
       - uses: bufbuild/buf-action@v1
         with:
           setup_only: true
-          github_token: ${{ secrets.GITHUB_TOKEN }}
 
       # TODO: also include v2/environments
       - uses: bufbuild/buf-action@v1
@@ -27,7 +30,7 @@ jobs:
         with:
           input: "rpc/flipt"
           breaking: true
-          breaking_against: "https://github.com/${GITHUB_REPOSITORY}.git#branch=v2"
+          breaking_against: .git#branch=v2
 
       # TODO: we need to version the protos for pushing
       # TODO: also include v2/environments