Fix indentation of groups yaml example (#28056)

Co-authored-by: Anne-Marie <102995847+am-stead@users.noreply.github.com>

Author: DenverCoder1

data/reusables/dependabot/dependabot-version-updates-groups-yaml-example.md

@@ -54,13 +54,13 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
-groups:
-  angular:
-    patterns:
-    - "@angular*"
-    update-types:
-    - "minor"
-    - "patch"
+    groups:
+      angular:
+        patterns:
+        - "@angular*"
+        update-types:
+        - "minor"
+        - "patch"
 ```
 
 ```yaml