ci: fix release workflow permissions

.github/workflows/release.yml

@@ -1,20 +1,25 @@
+# This GitHub Action automates the process of building Grafana plugins.
+# (For more information, see https://github.com/grafana/plugin-actions/blob/main/build-plugin/README.md)
 name: Release
 
 on:
   push:
     tags:
       - 'v*' # Run workflow on version tags, e.g. v1.0.0.
 
+permissions:
+  contents: write
+
 jobs:
   release:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: grafana/plugin-actions/build-plugin@release
-        # uncomment to enable plugin sign in
-        #with:
-        # see https://grafana.com/developers/plugin-tools/publish-a-plugin/sign-a-plugin#generate-an-access-policy-token to generate it
-        # save the value in your repository secrets
-        #policy_token: $
-        #usage of GRAFANA_API_KEY is deprecated prefer policy_token
-        #grafana_token: $
+          # Uncomment to enable plugin signing
+          # (For more info on how to generate the access policy token see https://grafana.com/developers/plugin-tools/publish-a-plugin/sign-a-plugin#generate-an-access-policy-token)
+          #with:
+          # Make sure to save the token in your repository secrets
+          #policy_token: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
+          # Usage of GRAFANA_API_KEY is deprecated, prefer `policy_token` option above
+        #grafana_token: ${{ secrets.GRAFANA_API_KEY }}