chore(deps): update dependency google-api-core to v2.8.1 (#1325)

Author: renovate-bot

packages/gapic-generator/requirements.txt

@@ -1,5 +1,5 @@
 click==8.1.3
-google-api-core==2.8.0
+google-api-core==2.8.1
 googleapis-common-protos==1.56.2
 jinja2==3.1.2
 MarkupSafe==2.1.1