feat: added missing permissions for release action

Signed-off-by: Richard Case <richard@weave.works>

Author: richardcase

.github/workflows/release.yml

@@ -12,6 +12,9 @@ env:
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     steps:
     - name: Checkout
       uses: actions/checkout@v2