post-title updates for theme and ux docs (#43023)

* post-title updates for theme and ux docs

* Update thumbnail-image-regeneration.md

docs/theme-development/thumbnail-image-regeneration.md

@@ -1,4 +1,6 @@
-# Thumbnail Image Regeneration
+---
+post_title: Thumbnail Image Regeneration
+---
 
 WooCommerce 3.3 introduced thumbnail regeneration functionality. In the past when image size settings were changed you would need to install an external plugin and then have it regenerate all WordPress image thumbnails before the changes would be visible.
 

docs/user-experience/accessibility.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - accessibility
+post_title: Accessibility
 ---
 
 ## Accessibility

docs/user-experience/best-practices.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - best practices
+post_title: User Experience Best practices
 ---
 
 ## Best practices

docs/user-experience/colors.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - colors
+post_title: Colors
 ---
 
 ## Colors

docs/user-experience/notices.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - notices
+post_title: Notices
 ---
 
 ## Notices

docs/user-experience/onboarding.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - onboarding
+post_title: Onboarding
 ---
 
 ## Onboarding

docs/user-experience/task-list-and-inbox.md

@@ -1,5 +1,5 @@
 ---
-post_title: User experience guidelines - task list and inbox
+post_title: Task list and inbox
 ---
 
 ## Task List & Inbox