🏃‍♂️allow ignoring missing changelog

Signed-off-by: Ashish Amarnath <ashisham@vmware.com>

.github/workflows/pr-changelog-check.yml

@@ -11,4 +11,5 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Changelog check
+      if: ${{ !contains(github.event.pull_request.labels.*.name, 'changelog-not-required') }}
       run: ./hack/changelog-check.sh

site/docs/master/code-standards.md

@@ -12,6 +12,8 @@ changelog.
 
 Add that to the PR.
 
+If a PR does not warrant a changelog, the CI check for a changelog can be skipped by applying a `changelog-not-required` label on the PR.
+
 ## Code
 
 - Log messages are capitalized.