ci: use explicit owner and repository and content app token input

Author: zimeg

.changeset/violet-pillows-wash.md

@@ -0,0 +1,5 @@
+---
+"slack-github-action": patch
+---
+
+ci: use explicit owner and repository and content app token input

.github/workflows/release.yml

@@ -58,6 +58,9 @@ jobs:
         with:
           client-id: ${{ secrets.GH_APP_CLIENT_ID }}
           private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+          repositories: ${{ github.event.repository.name }}
+          permission-contents: write
 
       - name: Checkout repo
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2