fix: add region tags for GCP documentation that references the README.

[willgoldby]

fix: add region tags for GCP documentation that references the README

[googlebot]

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[willgoldby]

@googlebot I fixed it.

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[codecov]

Codecov Report

Merging #59 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #59   +/-   ##
=========================================
  Coverage     73.13%   73.13%           
  Complexity      419      419           
=========================================
  Files            36       36           
  Lines          3384     3384           
  Branches         47       47           
=========================================
  Hits           2475     2475           
  Misses          849      849           
  Partials         60       60

Impacted Files	Coverage Δ	Complexity Δ
.../cloud/monitoring/v3/UptimeCheckServiceClient.java	54.45% <0%> (ø)	23% <0%> (ø)	⬇️
.../cloud/monitoring/v3/AlertPolicyServiceClient.java	63.21% <0%> (ø)	23% <0%> (ø)	⬇️
...monitoring/v3/stub/GrpcUptimeCheckServiceStub.java	92.1% <0%> (ø)	12% <0%> (ø)	⬇️
...monitoring/v3/stub/GrpcAlertPolicyServiceStub.java	92.36% <0%> (ø)	12% <0%> (ø)	⬇️
...cloud/monitoring/v3/stub/GrpcGroupServiceStub.java	93.28% <0%> (ø)	13% <0%> (ø)	⬇️
...toring/v3/stub/UptimeCheckServiceStubSettings.java	75% <0%> (ø)	16% <0%> (ø)	⬇️
...toring/v3/stub/AlertPolicyServiceStubSettings.java	80.74% <0%> (ø)	15% <0%> (ø)	⬇️
...loud/monitoring/v3/stub/GrpcMetricServiceStub.java	94.63% <0%> (ø)	15% <0%> (ø)	⬇️
...ring/v3/stub/GrpcServiceMonitoringServiceStub.java	95.43% <0%> (ø)	17% <0%> (ø)	⬇️
...d/monitoring/v3/stub/GroupServiceStubSettings.java	79.87% <0%> (ø)	16% <0%> (ø)	⬇️
... and 8 more

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[chingor13]

Approving/merging to unblock cloudsite. We actually want these in a separate snippet, which I'll add separately.

[willgoldby]

Thanks!