Update implementation-guide.mdx page title (#18837)

* Update implementation-guide.mdx

Need to retitle this page so it doesn't come up or accidentally be referenced by customers searching for 'implementation guide' when they're looking for actual product implementation guides.

* Update implementation-guide.mdx

title update

* Update implementation-guide.mdx

* Update src/content/docs/style-guide/documentation-content-strategy/content-types/implementation-guide.mdx

---------

Co-authored-by: Claire W <[email protected]>

Author: joslyn-cf

src/content/docs/style-guide/documentation-content-strategy/content-types/implementation-guide.mdx

@@ -1,7 +1,6 @@
 ---
 pcx_content_type: concept
-title: Implementation guide
-
+title: Implementation guide template
 ---
 
 ## Purpose