chore(deps): update dependency apache-beam to v2.38.0 (#573)

Author: renovate-bot

packages/google-cloud-bigtable/samples/beam/requirements.txt

@@ -1,3 +1,3 @@
-apache-beam==2.37.0
+apache-beam==2.38.0
 google-cloud-bigtable==2.9.0
 google-cloud-core==2.3.0