Update dependabot.yml

Sorry for the noise. I didn't read the docs

Author: arianvp

.github/dependabot.yml

@@ -1,6 +1,6 @@
 version: 2
 updates:
-  - package-ecosystem: "golang"
+  - package-ecosystem: "gomod"
     directory: "/"
     schedule:
       interval: "weekly"