build: auto-approve renovate-bot PRs for minor updates (#1145) (#1360)

Source-Link: googleapis/synthtool@39652e3
Post-Processor: gcr.io/repo-automation-bots/owlbot-nodejs:latest@sha256:41d5457ff79c3945782ab7e23bf4d617fd7bf3f2b03b6d84808010f7d2e10ca2

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-nodejs:latest
-  digest: sha256:e59b73e911585903ee6b8a1c5246e93d9e9463420f597b6eb2e4b616ee8a0fee
+  digest: sha256:41d5457ff79c3945782ab7e23bf4d617fd7bf3f2b03b6d84808010f7d2e10ca2

.github/auto-approve.yml

@@ -4,4 +4,9 @@ rules:
   changedFiles:
   - "package\\.json$"
   - "CHANGELOG\\.md$"
-  maxFiles: 3
+  maxFiles: 3
+- author: "renovate-bot"
+  title: "^(fix\\(deps\\)|chore\\(deps\\)):"
+  changedFiles: 
+  - "/package\\.json$"
+  maxFiles: 2