chore: remove dependabot.yaml from sync-files (autowarefoundation#280)

Signed-off-by: Yuma Nihei <yuma.nihei@tier4.jp>

Author: yn-mrse

.github/sync-files.yaml

@@ -1,6 +1,6 @@
 - repository: autowarefoundation/autoware
   files:
-    - source: .github/dependabot.yaml
+    # - source: .github/dependabot.yaml # Open-pull-requests-limit changed in X1 (0 -> 1)
     # - source: .github/workflows/build.yaml # TODO: Sync after renaming to autoware.repos
     - source: .github/workflows/pre-commit.yaml
     - source: .github/workflows/pre-commit-ansible.yaml