chore: update renovate config to ignore some deps as their new versions are not compatible with java 8 (#1589)

Co-authored-by: Jonathan Hess (he/him) <[email protected]>

Author: ttosta-google

.github/renovate.json

@@ -9,6 +9,12 @@
   "dependencyDashboard": true,
   "dependencyDashboardLabels": ["type: process"],
   "semanticCommits": "disabled",
+  "ignoreDeps": [
+    "com.coveo:fmt-maven-plugin", 
+    "com.zaxxer:HikariCP", 
+    "com.google.googlejavaformat:google-java-format",
+    "com.google.errorprone:error_prone_core"
+  ],
   "packageRules": [
     {
       "matchPackagePatterns": [".*"],