ci: make sure we pick up new doc files

Author: Sameer Naik

.circleci/config.yml

@@ -38,9 +38,9 @@ jobs:
           name: Committing updates to triggermesh/docs
           working_directory: tm-docs/
           command: |
-            if ! git diff --exit-code --quiet; then
-              git --no-pager diff
-              git add docs/reference/
+            git add docs/reference/
+            if ! git diff --cached --exit-code --quiet; then
+              git --no-pager diff --cached
               git commit -m "Generated with gen-crd-api-reference-docs on git commit triggermesh-core:${CIRCLE_TAG:-${CIRCLE_SHA1}}"
               git push origin main
             fi