Auto-merge renovate patch updates (#1152)

.renovaterc.json

 {
-  "regexManagers": [
-    {
-      "fileMatch": ["flux2/.+release\\.yaml$"],
-      "matchStrings": [
-        "registryUrl=(?<registryUrl>.*?)\n *chart: (?<depName>.*?)\n *version: (?<currentValue>.*)\n"
-      ],
-      "datasourceTemplate": "helm"
+    "regexManagers": [
+        {
+            "fileMatch": [
+                "flux2/.+release\\.yaml$"
+            ],
+            "matchStrings": [
+                "registryUrl=(?<registryUrl>.*?)\n *chart: (?<depName>.*?)\n *version: (?<currentValue>.*)\n"
+            ],
+            "datasourceTemplate": "helm"
+        }
+    ],
+    "packageRules": [
+        {
+            "matchUpdateTypes": [
+                "patch"
+            ],
+            "automerge": true
+        }
+    ],
+    "pip-compile": {
+        "fileMatch": [
+            "(^|/)requirements\\.in$"
+        ]
+    },
+    "pip_requirements": {
+        "enabled": false
     }
-  ],
-  "pip-compile": {
-    "fileMatch": ["(^|/)requirements\\.in$"]
-  },
-  "pip_requirements": {
-    "enabled": false
-  }
 }