Nit: fix Tip blocks case (microsoft#165223)

Author: SphinxKnight

src/vs/workbench/contrib/welcomeWalkthrough/browser/editor/vs_code_editor_walkthrough.ts

@@ -40,7 +40,7 @@ That is the tip of the iceberg for multi-cursor editing. Have a look at the sele
 #p3 {background-color: rgba(0, 4, 255, 0.733);} /* blue with alpha channel in RGBA format */
 |||
 
-> **CSS Tip:** you may have noticed in the example above we also provide color swatches inline for CSS, additionally if you hover over an element such as |#p1| we will show how this is represented in HTML.  These swatches also act as color pickers that allow you to easily change a color value.  A simple example of some language-specific editor features.
+> **CSS Tip:** You may have noticed in the example above we also provide color swatches inline for CSS, additionally if you hover over an element such as |#p1| we will show how this is represented in HTML.  These swatches also act as color pickers that allow you to easily change a color value.  A simple example of some language-specific editor features.
 
 ### IntelliSense
 
@@ -54,7 +54,7 @@ context.strokeStyle = 'blue';
 context.
 |||
 
->**Tip:** while we ship JavaScript and TypeScript support out of the box other languages can be upgraded with better IntelliSense through one of the many [extensions](command:workbench.extensions.action.showPopularExtensions).
+>**Tip:** While we ship JavaScript and TypeScript support out of the box other languages can be upgraded with better IntelliSense through one of the many [extensions](command:workbench.extensions.action.showPopularExtensions).
 
 
 ### Line Actions
@@ -153,7 +153,7 @@ You can greatly accelerate your editing through the use of snippets.  Simply sta
 
 |||
 
->**Tip:** the [extension gallery](command:workbench.extensions.action.showPopularExtensions) includes snippets for almost every framework and language imaginable.  You can also create your own [user-defined snippets](command:workbench.action.openSnippets).
+>**Tip:** The [extension gallery](command:workbench.extensions.action.showPopularExtensions) includes snippets for almost every framework and language imaginable.  You can also create your own [user-defined snippets](command:workbench.action.openSnippets).
 
 
 ### Emmet