patch(github-exporter): raised chart version to 9.1.1

Author: GitHub Actions

stable/github-exporter/Chart.yaml

@@ -25,4 +25,4 @@ name: github-exporter
 sources:
 - https://github.com/promhippie/github_exporter
 type: application
-version: 9.1.0
+version: 9.1.1