Update workflow permissions (#495)

Author: satyakigh

.github/workflows/alpha-release.yml

@@ -55,5 +55,6 @@ jobs:
     uses: ./.github/workflows/release.yml
     permissions:
       contents: write
+      pull-requests: write
     with:
       tag: ${{ needs.create-alpha-tag.outputs.tag }}

.github/workflows/beta-release.yml

@@ -43,5 +43,6 @@ jobs:
     uses: ./.github/workflows/release.yml
     permissions:
       contents: write
+      pull-requests: write
     with:
       tag: ${{ needs.create-beta-tag.outputs.tag }}

.github/workflows/prod-release.yml

@@ -59,5 +59,6 @@ jobs:
     uses: ./.github/workflows/release.yml
     permissions:
       contents: write
+      pull-requests: write
     with:
       tag: ${{ needs.promote-beta-to-prod.outputs.tag }}