ci: use gomodTidy postUpdateOption instead of postUpgradeTasks (#205)

Author: zdenko-kovac

renovate.json

@@ -11,13 +11,9 @@
   "prConcurrentLimit": 10,
   "semanticCommits": "enabled",
   "postUpdateOptions": [
-    "gomodUpdateImportPaths"
+    "gomodUpdateImportPaths",
+    "gomodTidy"
   ],
-  "postUpgradeTasks": {
-    "commands": ["go mod tidy"],
-    "fileFilters": ["go.sum"],
-    "executionMode": "branch"
-  },
   "ignoreDeps": [
     "docker.io/bitnami/redis",
     "docker.io/bitnami/redis-sentinel",