Fix .github/dependabot.yml (observatorium#853)

`allowed_updates` property isn't a supported property.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

Author: simonpasquier

.github/dependabot.yml

@@ -4,19 +4,6 @@ updates:
   directory: "/"
   schedule:
     interval: weekly
-  allowed_updates:
-  - match:
-      dependency-name: "k8s.io/api"
-      update-type: "semver-patch"
-  - match:
-      dependency-name: "k8s.io/apimachinery"
-      update-type: "semver-patch"
-  - match:
-      dependency-name: "k8s.io/apiserver"
-      update-type: "semver-patch"
-  - match:
-      dependency-name: "k8s.io/client-go"
-      update-type: "semver-patch"
 
 - package-ecosystem: github-actions
   directory: "/"