chore(deps): skip the Dependabot cooldown for packages this org publishes (#484)

Since 2026-07-14 Dependabot waits 3 days after a release before proposing
a version update. cpp-linter 1.14.0 reached PyPI on 2026-09-13 and every
job since logged "Filtered out 1 versions due to cooldown". The delay is
meant for third-party releases; cpp-linter and clang-tools are published
by this org, so exclude them and keep the 3-day default for everything
else.

Author: shenxianpeng

.github/dependabot.yml

@@ -19,6 +19,13 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 10
+    cooldown:
+      # GitHub applies a 3-day cooldown to version updates by default; keep it
+      # for third-party packages, but not for the ones this org publishes.
+      default-days: 3
+      exclude:
+        - "cpp-linter"
+        - "clang-tools"
     groups:
       org:
         # org-maintained packages (the "action" dependency group)