chore(renovate): update settings for latest version (#7329)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7329
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Co-committed-by: Michael Kriese <michael.kriese@visualon.de>

renovate.json

@@ -58,19 +58,6 @@
         "ghcr.io/devcontainers-contrib/features/**"
       ]
     },
-    {
-      "description": "Group nodejs packages",
-      "matchPackageNames": [
-        "code.forgejo.org/oci/node",
-        "data.forgejo.org/oci/node",
-        "docker.io/library/node",
-        "docker.io/node",
-        "node"
-      ],
-      "groupName": "nodejs packages",
-      "versionCompatibility": "^(?<version>[^-]+)(?<compatibility>-.*)?$",
-      "versioning": "node"
-    },
     {
       "description": "x/tools/* are used in the CI only and upgraded together",
       "matchUpdateTypes": ["minor", "patch", "digest"],
@@ -116,7 +103,7 @@
       "matchDatasources": ["docker"],
       "matchPackageNames": ["data.forgejo.org/renovate/renovate"],
       "reviewers": ["viceice"],
-      "addLabels": ["forgejo/ci", "test/not-needed"]
+      "addLabels": ["forgejo/ci"]
     },
     {
       "description": "Disable renovate self-updates for release branches",
@@ -167,14 +154,6 @@
     }
   ],
   "customManagers": [
-    {
-      "description": "Update node-version in forgejo workflows",
-      "customType": "regex",
-      "fileMatch": ["^.forgejo/workflows/.+\\.yml$"],
-      "matchStrings": ["\\s+node-version: ['\"]?(?<currentValue>.+?)['\"]?\\s"],
-      "depNameTemplate": "node",
-      "datasourceTemplate": "node-version"
-    },
     {
       "description": "Update deps inside Makefile",
       "customType": "regex",