chore: update Dependabot configuration to ignore commander dependency

- Modified the .github/dependabot.yml file to add commander to the list of ignored dependencies.
- This change ensures that Dependabot will not create update PR

Author: ryota-murakami

.github/dependabot.yml

@@ -6,3 +6,5 @@ updates:
     schedule:
       interval: 'daily'
     target-branch: 'main'
+    ignore:
+      - dependency-name: 'commander'