Merge branch 'main' into avm99963-monorail

Merged commit 4137ed7879acadbf891e8c471108acb874dae886.

GitOrigin-RevId: b6100ffc5b1da355a35f37b13fcaaf746ee8b307
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 8d3a527..e1f6ec2 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -17,6 +17,9 @@
 # Required by gae.py and by dev_appserver.py
 six==1.15.0 --hash=sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced
 
+# Required by Flask==1.1.4
+MarkupSafe==0.23 --hash=sha256:a4ec1aff59b95a14b45eb2e23761a0179e98319da5a7eb76b56ea8cdc7b871c3
+
 # Required by grpc-google-iam-v1 <-- google-cloud-tasks
 # first sha is for cp27m-macosx_10_9_x86
 # second sha is for cp27mu-manylinux2010_x86