Replace access and secret key with assume role

Author: mmosarafO2

.github/workflows/deploy-docs-staging.yaml

@@ -8,6 +8,9 @@ on:
 jobs:
   deploy:
     runs-on: org-openobserve-standard-4
+    permissions:
+      id-token: write
+      contents: read
 
     steps:
     - name: Checkout source code