Update requirements.txt

Author: abbrowne126

samples/snippets/requirements.txt

@@ -6,6 +6,8 @@ protobuf==6.31.1; python_version >= '3.9'
 avro==1.12.0
 opentelemetry-api===1.22.0; python_version == '3.7'
 opentelemetry-sdk===1.22.0; python_version == '3.7'
+opentelemetry-api===1.33.1; python_version == '3.8'
+opentelemetry-sdk===1.33.1; python_version == '3.8'
 opentelemetry-api==1.34.1; python_version >= '3.8'
 opentelemetry-sdk==1.34.1; python_version >= '3.8'
 opentelemetry-exporter-gcp-trace==1.9.0