chore(deps): pin markupsafe version (#7483)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: dandhlee

composer/airflow_1_samples/requirements.txt

@@ -8,3 +8,4 @@ scipy==1.4.1; python_version > '3.0'
 scipy==1.2.3; python_version < '3.0'
 numpy==1.19.5; python_version > '3.0'
 numpy==1.16.6; python_version < '3.0'
+markupsafe==2.0.1

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

@@ -1,5 +1,6 @@
 # Don't upgrade to 2.0.0 until opentelemtry-instrumentation-flask is okay with it
 Flask==1.1.4
+markupsafe==2.0.1
 opentelemetry-exporter-gcp-trace==1.0.0
 opentelemetry-propagator-gcp==1.1.0
 opentelemetry-instrumentation-flask==0.20b0

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

@@ -3,6 +3,7 @@ google-cloud-trace==0.24.0
 opencensus==0.8.0
 # Don't upgrade to 2.0.0 yet until opencensus-ext-flask is okay with it
 Flask==1.1.4
+markupsafe==2.0.1
 opencensus-ext-stackdriver==0.8.0
 opencensus-ext-flask==0.7.6 # requires flask!=1.1.3, <2.0.0 and >=0.12.3
 opencensus-context==0.1.2