fix typo in memorystore commit

Author: Mathieu Benoit

content/onlineboutique/allow-memorystore.md

@@ -116,7 +116,7 @@ EOF
 ```Bash
 cd ~/$WORKSHOP_ORG_DIR_NAME/
 git add .
-git commit -m "Allow Security for GKE project"
+git commit -m "Allow Memorystore for GKE project"
 git push origin main
 ```