Change 'Powershell' to 'PowerShell'.

Two times 'Powershell' was written in this text instead of 'PowerShell', which makes them inconsistent with the rest of the text where it was properly written as 'PowerShell'.

Author: richy58729

Style-Guide/Documentation-and-Comments.md

@@ -98,7 +98,7 @@ It is also possible to write `.PARAMETER` statements with the rest of the docume
 
 ##### Provide Usage Examples
 
-Your help should always provide an example for each major use case. A 'usage example' is just an example of what you would type in to Powershell to run the script - you can even cut and paste one from the command line while you're testing your function.
+Your help should always provide an example for each major use case. A 'usage example' is just an example of what you would type in to PowerShell to run the script - you can even cut and paste one from the command line while you're testing your function.
 
 ```PowerShell
 function Test-Help {
@@ -171,4 +171,4 @@ Comment-based help is displayed when the user types `help Get-Example` or `Get-E
 
 Your help should be helpful. That is, if you've written a tool called `Get-LOBAppUser`, don't write help that merely says, "Gets LOB App Users." Duh.
 
-**Further information:** You can get more on the use of comment-based help by typing `help about_Comment_Based_Help` within Powershell.
+**Further information:** You can get more on the use of comment-based help by typing `help about_Comment_Based_Help` within PowerShell.