[skip-ci] Update renovate deprecated property (#524) (#525)

(cherry picked from commit f8b34b7)

Co-authored-by: Jorge Sanz <[email protected]>

Author: github-actions[bot]

renovate.json

@@ -5,7 +5,7 @@
   "extends": [
     "github>elastic/renovate-config"
   ],
-  "baseBranches": ["master", "feature-layers"],
+  "baseBranchPatterns": ["master", "feature-layers"],
   "labels": [
     "dependencies"
   ]