dependabot.yml: update to match main configuration

.github/dependabot.yml

@@ -1,20 +1,21 @@
 # This file is synced from the `.github` repository, do not modify it directly.
 ---
 version: 2
-updates:
-- package-ecosystem: github-actions
-  directory: "/"
+multi-ecosystem-groups:
+  all:
     schedule:
       interval: weekly
       day: friday
       time: '08:00'
       timezone: Etc/UTC
-  allow:
-  - dependency-type: all
-  groups:
-    dependabot:
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  multi-ecosystem-group: all
   patterns:
   - "*"
+  allow:
+  - dependency-type: all
   cooldown:
     default-days: 1
     include:
@@ -22,17 +23,11 @@ updates:
 - package-ecosystem: bundler
   directories:
   - "/Library/Homebrew"
-  schedule:
-    interval: weekly
-    day: friday
-    time: '08:00'
-    timezone: Etc/UTC
-  allow:
-  - dependency-type: all
-  groups:
-    dependabot:
+  multi-ecosystem-group: all
   patterns:
   - "*"
+  allow:
+  - dependency-type: all
   cooldown:
     default-days: 1
     semver-major-days: 14
@@ -42,30 +37,18 @@ updates:
     - "*"
 - package-ecosystem: docker
   directory: "/"
-  schedule:
-    interval: weekly
-    day: friday
-    time: '08:00'
-    timezone: Etc/UTC
-  allow:
-  - dependency-type: all
-  groups:
-    dependabot:
+  multi-ecosystem-group: all
   patterns:
   - "*"
+  allow:
+  - dependency-type: all
 - package-ecosystem: devcontainers
   directory: "/"
-  schedule:
-    interval: weekly
-    day: friday
-    time: '08:00'
-    timezone: Etc/UTC
-  allow:
-  - dependency-type: all
-  groups:
-    dependabot:
+  multi-ecosystem-group: all
   patterns:
   - "*"
+  allow:
+  - dependency-type: all
   cooldown:
     default-days: 1
     include:
@@ -73,17 +56,11 @@ updates:
 - package-ecosystem: pip
   directories:
   - "/Library/Homebrew/formula-analytics/"
-  schedule:
-    interval: weekly
-    day: friday
-    time: '08:00'
-    timezone: Etc/UTC
-  allow:
-  - dependency-type: all
-  groups:
-    dependabot:
+  multi-ecosystem-group: all
   patterns:
   - "*"
+  allow:
+  - dependency-type: all
   cooldown:
     default-days: 1
     semver-major-days: 14