ci(renovate): Add go mod tidy call as postUpgrade

This patch should improve go mod handling of renovate

renovate.json

@@ -80,5 +80,5 @@
       "extends": ["docker:pinDigests"]
     }
   ],
-  "postUpdateOptions": ["helmUpdateSubChartArchives"]
+  "postUpdateOptions": ["helmUpdateSubChartArchives","gomodTidy"]
 }