Update cla.yaml to v2 (#1120)

Author: beliaev-maksim

.github/workflows/cla.yaml

@@ -5,15 +5,10 @@ on:
     branches:
       - main
       - 'release-[0-9]+.[0-9]+'
-
-permissions:
-  contents: read
 
 jobs:
   cla-check:
-    permissions:
-      pull-requests: write  # for canonical/has-signed-canonical-cla to create & update comments
     runs-on: ubuntu-latest
     steps:
       - name: Check if CLA signed
-        uses: canonical/has-signed-canonical-cla@v1
+        uses: canonical/has-signed-canonical-cla@v2