Update actions/checkout action to v6

.github/workflows/main.yaml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Login to registry
         if: ${{ github.ref_name == 'main' }}

.renovaterc.json5

@@ -1,22 +1,13 @@
 {
-  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
-  dependencyDashboard: true,
-  enabledManagers: [
-    'dockerfile',
-    'github-actions',
-    'custom.regex',
-  ],
-  customManagers: [
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "dependencyDashboard": true,
+  "enabledManagers": ["dockerfile", "github-actions", "regex"],
+  "regexManagers": [
     {
-      customType: 'regex',
-      managerFilePatterns: [
-        '/^Dockerfile$/',
-      ],
-      matchStrings: [
-        'synapse-s3-storage-provider==(?<currentValue>.*)\\n',
-      ],
-      depNameTemplate: 'synapse-s3-storage-provider',
-      datasourceTemplate: 'pypi',
+      "fileMatch": ["^Dockerfile$"],
+      "matchStrings": ["synapse-s3-storage-provider==(?<currentValue>.*)\\n"],
+      "depNameTemplate": "synapse-s3-storage-provider",
+      "datasourceTemplate": "pypi",
     },
   ],
 }

Dockerfile

@@ -1,3 +1,3 @@
-FROM ghcr.io/element-hq/synapse:v1.143.0@sha256:a47a21d85998a452a0d6965a8fd8d05d89a90d33213020bb1e42f7a4e49b4df6
+FROM ghcr.io/element-hq/synapse:v1.142.0@sha256:b90a9e1158a5acb844479edd671ade5baf60c7f6120028e71dc2e090225d5509
 
 RUN /usr/local/bin/pip install synapse-s3-storage-provider==1.6.0