deps: Configure renovate for JRuby

Add a package rule to configure that JRuby should only be updated in
the 9.x version range.

Signed-off-by: Oliver Heger <[email protected]>

Author: oheger-bosch

renovate.json

@@ -27,6 +27,12 @@
       ],
       "allowedVersions": "/^[0-9]+\\.[0-9]+\\.[0-9]+$/"
     },
+    {
+      "matchPackageNames": [
+        "org.jruby:jruby"
+      ],
+      "allowedVersions": "<10.0.0.0"
+    },
     {
       "matchPackageNames": [
         "software.amazon.awssdk:*"