chore: exclude files not intended for end user

Signed-off-by: Wen Zhou <wenzhou@redhat.com>

Author: zdtsw

.github/workflows/helm-sync.yml

@@ -69,6 +69,11 @@ jobs:
             rsync -a \
               --exclude '/test/' \
               --exclude '/scripts/' \
+              --exclude 'values.schema.json' \
+              --exclude 'api-docs.md' \
+              --exclude 'README.md' \
+              --exclude '.helmignore' \
+              --exclude 'templates/NOTES.txt' \
               "source_repo/charts/${chart}/" \
               "target_repo/to-be-processed/helm/${chart}/"
           done