use mongo-ruby-driver v2.19 submodule

Chris Cho · Chris Cho · commit 6a9a99094458 · 2023-09-12T14:57:46.000-04:00
diff --git a/.gitmodules b/.gitmodules
@@ -1,7 +1,7 @@
 [submodule "mongo-ruby-driver"]
 	path = mongo-ruby-driver
 	url = https://github.com/mongodb/mongo-ruby-driver.git
-	branch = master
+	branch = 2.19-stable
 [submodule "bson-ruby"]
 	path = bson-ruby
 	url = https://github.com/mongodb/bson-ruby.git
