DOCSP-45880 Add parallel operations note (#107)

(cherry picked from commit bda9c28)

Author: jordan-smith721

snooty.toml

@@ -2,3 +2,8 @@ name = "ruby-driver"
 title = "Ruby MongoDB Driver"
 
 intersphinx = ["https://www.mongodb.com/docs/manual/objects.inv"]
+
+sharedinclude_root = "https://raw.githubusercontent.com/10gen/docs-shared/main/"
+
+[constants]
+driver-short = "Ruby driver"

source/reference/transactions.txt

@@ -2,8 +2,6 @@
 Transactions
 ************
 
-.. default-domain:: mongodb
-
 .. contents:: On this page
    :local:
    :backlinks: none
@@ -16,6 +14,8 @@ Version 4.0 of the MongoDB server introduces
 (Updates to multiple fields within a single document are atomic in all
 versions of MongoDB.) Ruby driver version 2.6.0 adds support for transactions.
 
+.. sharedinclude:: dbx/transactions-parallelism.rst
+
 .. _using-transactions:
 
 Using Transactions