Since we use Maven we should use this in Dependabot

Signed-off-by: Sven Strittmatter <sven.strittmatter@iteratec.com>

Author: Weltraumschaf

.github/dependabot.yml

@@ -5,7 +5,7 @@
 
 version: 2
 updates:
-  - package-ecosystem: "gradle"
+  - package-ecosystem: "maven"
     directory: "/"
     schedule:
       interval: "weekly"