Let Dependabot upgrade minor versions of Actions (#50665)

.github/dependabot.yml

@@ -20,8 +20,7 @@ updates:
       day: wednesday
     ignore:
       - dependency-name: '*'
-        update-types:
-          ['version-update:semver-patch', 'version-update:semver-minor']
+        update-types: ['version-update:semver-patch']
 
   - package-ecosystem: 'docker'
     directory: '/'