fix: typo in dependabot.yml config file

Author: ixartz

.github/dependabot.yml

@@ -10,7 +10,7 @@ updates:
       time: '06:00'
     # Limit the number of open pull requests for version updates to 1
     open-pull-requests-limit: 1
-    group:
+    groups:
       # The name of the group (identifier)
       npm-deps:
         update-types: [minor, patch]