chore: Create renovate_config_check.yaml (#1920)

[gcf-owl-bot[bot]]

• chore: Create renovate_config_check.yaml Source-Link: https://github.com/googleapis/synthtool/commit/6612ab8f3afcd5e292aecd647f0fa68812c9f5b5 Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:a6aa751984f1e905c3ae5a3aac78fc7b68210626ce91487dc7ff4f0a06f010cc

[lqiu96]

Should be merged in https://github.com/googleapis/java-shared-config/pull/805