OP: change version in Redis Stack relnotes heading (#827)

Author: dwdougherty

content/operate/oss_and_stack/stack-with-enterprise/release-notes/redisstack/_index.md

@@ -5,7 +5,7 @@ categories:
 - docs
 - operate
 - stack
-description: Redis Stack release notes for version 7.4 and later
+description: Redis Stack release notes for version 7.2 and later
 hideListLinks: true
 linkTitle: Redis Stack
 tags: