chore: temporarily disable auto value dependency updates until after LTS release (#965)

Author: ldetmer

renovate.json

@@ -13,6 +13,12 @@
   "ignorePaths": [".kokoro/requirements.txt"],
   "ignoreDeps": ["org.codehaus.mojo:flatten-maven-plugin"],
   "packageRules": [
+    {
+      "packagePatterns": [
+        "^com.google.auto.value:"
+      ],
+      "enabled": false
+    },
     {
       "packagePatterns": [
         "*"