build: only dependency for minor versions

Avoid getting spammed by the update bot.

Signed-off-by: Daniel Wagner <wagi@kernel.org>

Author: igaw

.github/dependabot.yml

@@ -1,7 +1,13 @@
 ---
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 version: 2
 updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "weekly"
+    ignore:
+      - dependency-name: "*"
+        update-types:
+          - "version-update:semver-patch"