Allow Dependabot minor version updates on main

Remove the semver-minor ignore from the maven entry targeting main so
Dependabot opens PRs for minor dependency updates. Major updates remain ignored.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Author: ryanjbaxter

.github/dependabot.yaml

@@ -19,11 +19,10 @@ updates:
       interval: daily
     target-branch: main
     ignore:
-      # only upgrade by minor or patch
+      # ignore major updates
       - dependency-name: "*"
         update-types:
           - version-update:semver-major
-          - version-update:semver-minor
   - package-ecosystem: npm
     target-branch: docs-build
     directory: /