chore(deps): update dependency google-api-core to v2.6.0 (GoogleCloudPlatform#7546)

Author: renovate-bot

composer/cicd_sample/utils/requirements-test.txt

@@ -1,4 +1,4 @@
 pytest==6.2.3
 requests==2.27.1
-google-api-core==2.5.0
+google-api-core==2.6.0
 google-resumable-media==2.3.0

monitoring/opencensus/requirements.txt

@@ -1,5 +1,5 @@
 Flask==2.0.2
-google-api-core==2.5.0
+google-api-core==2.6.0
 google-auth==2.5.0
 googleapis-common-protos==1.55.0
 opencensus==0.8.0

monitoring/prometheus/requirements.txt

@@ -1,5 +1,5 @@
 Flask==2.0.2
-google-api-core==2.5.0
+google-api-core==2.6.0
 google-auth==2.5.0
 googleapis-common-protos==1.55.0
 prometheus-client==0.13.1