chore: update permissions for actions workflows

Author: mvkaran

.github/workflows/trigger-deploy-on-comment.yml

@@ -2,6 +2,7 @@ name: Trigger deploy on comment
 on:
   issue_comment:
     types: [created]
+permissions: read-all
 jobs:
   if_merged:
     if: github.event.issue.pull_request && contains(github.event.comment.body, '/deploy')

.github/workflows/website-pr-validation.yml

@@ -9,6 +9,7 @@ on:
 jobs:
   lint:
     runs-on: ubuntu-latest
+    permissions: read-all
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3
@@ -40,6 +41,10 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     needs: lint
+    permissions:
+      contents: read
+      pull-requests: write
+      actions: write
     steps:
       - name: Checkout fork
         uses: actions/checkout@v3