[Docs] Only build docs if documentation or ready labels are present (#36135)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

.readthedocs.yaml

@@ -9,6 +9,7 @@ build:
     python: "3.12"
   jobs:
     post_checkout:
+      - bash docs/maybe_skip_pr_build.sh
       - git fetch origin main --unshallow --no-tags --filter=blob:none || true
     pre_create_environment:
       - pip install uv