Fixed dependabot config

Author: RaphiMC

.github/dependabot.yml

@@ -1,9 +1,19 @@
 version: 2
+registries:
+  maven-central:
+    type: maven-repository
+    url: "https://repo.maven.apache.org/maven2/"
+  viaversion-maven:
+    type: maven-repository
+    url: "https://repo.viaversion.com/"
 updates:
   - package-ecosystem: "gradle"
     directory: "/"
     schedule:
       interval: "daily"
+    registries:
+      - maven-central
+      - viaversion-maven
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule: