chore(deps): update dependency google-cloud-trace to v1.6.1 (GoogleCloudPlatform#7567)

* chore(deps): update dependency google-cloud-trace to v1.6.1

* chore(deps): Update trace/cloud-trace-demo-app/app/requirements.txt

* chore(deps): Update trace/cloud-trace-demo-app/app/requirements.txt

Co-authored-by: Dan Lee <[email protected]>
Co-authored-by: Leah E. Cole <[email protected]>

Author: 3 people

trace/cloud-trace-demo-app-opentelemetry/app/requirements.txt

@@ -7,4 +7,4 @@ opentelemetry-instrumentation-flask==0.20b0
 grpcio==1.44.0
 httpretty==1.1.4
 google-cloud-monitoring==2.9.1
-google-cloud-trace==1.6.0
+google-cloud-trace==1.6.1