ci: update deployment permissions to include write access for contents

Author: deandreamatias

.github/workflows/base-beta.yaml

@@ -36,6 +36,7 @@ jobs:
   deployment:
     permissions:
       id-token: write
+      contents: write
     uses: flutter-form-builder-ecosystem/.github/.github/workflows/deployment.yaml@main
     if: ${{ github.ref_type == 'tag' }}
     needs: [build, example]

.github/workflows/base.yaml

@@ -30,6 +30,7 @@ jobs:
   deployment:
     permissions:
       id-token: write
+      contents: write
     uses: flutter-form-builder-ecosystem/.github/.github/workflows/deployment.yaml@main
     if: ${{ github.ref_type == 'tag' }}
     needs: [build, example]