bump docs with e2e commands (#3648)

docs/contributing/process.md

@@ -38,7 +38,11 @@ We have an extensive set of e2e tests that test the integration with *real* clou
 Maintainers must trigger these kind of tests manually for PRs that come from forked repositories. These tests run inside a `kind` cluster in the GitHub Actions runner:
 
 ```
-/ok-to-test sha=xxxxxx
+/ok-to-test sha=<full_commit_hash>
+```
+Examples:
+```
+/ok-to-test sha=b8ca0040200a7a05d57048d86a972fdf833b8c9b
 ```
 
 #### Executing e2e tests locally