chore(docs): update dependency protobuf [security]

Author: renovate[bot]

docs/examples/fork-process-model/flask-gunicorn/requirements.txt

@@ -12,7 +12,7 @@ opentelemetry-instrumentation==0.41b0
 opentelemetry-instrumentation-flask==0.41b0
 opentelemetry-instrumentation-wsgi==0.41b0
 opentelemetry-sdk==1.20.0
-protobuf==3.20.3
+protobuf==6.33.5
 six==1.15.0
 thrift==0.13.0
 uWSGI==2.0.22

docs/examples/fork-process-model/flask-uwsgi/requirements.txt

@@ -11,7 +11,7 @@ opentelemetry-instrumentation==0.41b0
 opentelemetry-instrumentation-flask==0.41b0
 opentelemetry-instrumentation-wsgi==0.41b0
 opentelemetry-sdk==1.20.0
-protobuf==3.20.3
+protobuf==6.33.5
 six==1.15.0
 thrift==0.13.0
 uWSGI==2.0.22

docs/examples/metrics/prometheus-grafana/requirements.txt

@@ -1,2 +1,2 @@
 opentelemetry-exporter-prometheus==1.12.0rc1
-protobuf~=3.18.1
+protobuf~=3.20.3