konflux/renovate: update main branch only

As we sync the other branches from testing-devel, we don't need
Renovate/MintMaker to watch those branches.

Author: joelcapitao

renovate.json

@@ -4,10 +4,7 @@
   "prHourlyLimit": 0,
   "branchConcurrentLimit": 0,
   "baseBranchPatterns": [
-    "testing-devel",
-    "next-devel",
-    "rawhide",
-    "branched"
+    "testing-devel"
   ],
   "packageRules": [
     {