Update dependabot.yml (#12396)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/dependabot.yml

@@ -1,3 +1,7 @@
+# Ultralytics YOLO 🚀, AGPL-3.0 license
+# Dependabot for package version updates
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
 version: 2
 updates:
   - package-ecosystem: pip
@@ -12,7 +16,7 @@ updates:
       - dependencies
 
   - package-ecosystem: github-actions
-    directory: "/"
+    directory: "/.github/workflows"
     schedule:
       interval: weekly
       time: "04:00"