605 fix broken links on profiles (#1319)

* Update Peter-Gfader.md

* Update William-Liebenberg.md

* Update Martin-Hinshelwood.md

Martin-Hinshelwood/Martin-Hinshelwood.md

@@ -23,7 +23,7 @@ Some of Martin’s highlights have been:
 
 Martin’s open source projects:
 
-* **TFS Event Handler** - If you assign someone a work item, they should always receive an email. The TFS Event Handler makes it easier to notify users of changes to Work Items in Team Foundation Server. You will no longer need to add individual alerts to users.   
+* **TFS Event Handler** - If you assign someone a Work Item, they should always receive an email. The TFS Event Handler makes it easier to notify users of changes to Work Items in Team Foundation Server. You will no longer need to add individual alerts to users.   
     Related Technology: Team Foundation Server, VB.NET, WCF, Windows Services 
-* **TFS Sticky Buddy** - TFS Sticky Buddy makes it easier for all members of the development team to visualise the current state of their project by utilising a graphical view of Work Items. (Only for TFS 2005 & 2008. This is not relevant in VS2010 since Telerik’s work item manager has taken this idea to next step.)   
+* **TFS Sticky Buddy** - TFS Sticky Buddy makes it easier for all members of the development team to visualise the current state of their project by utilising a graphical view of Work Items. (Only for TFS 2005 & 2008. This is not relevant in VS2010 since Telerik’s Work Item manager has taken this idea to next step.)   
     Related Technology: Team Foundation Server, VB.NET, WPF 

Peter-Gfader/Peter-Gfader.md

@@ -75,8 +75,8 @@ Training in C#, .NET and best practices for a new line of business application
 
 Peter can also be found teaching [UTS Short Courses](https://it.uts.edu.au/course/shortcourse/programming/) in .NET, SQL Server 2008
 
-More information about Peter, can be found on his [personal homepage](https://www.gfader.com/ "Peter Gfader Homepage"). Check out [Peters blog for solutions, tips + tricks to common .net troubles](https://peitor.blogspot.com/ ".net problems and solutions") 
+More information about Peter, can be found on his [personal homepage](https://www.gfader.com/ "Peter Gfader Homepage"). Check out [Peters blog for solutions, tips + tricks to common .net troubles](https://blog.gfader.com/) 
 
 ##### "If it ain't broke, take it apart and fix it."   
 
-"or use Unit tests"
+"or use Unit tests"

William-Liebenberg/William-Liebenberg.md

@@ -124,7 +124,7 @@ William is a trainer on the [SSW Azure Superpowers Tour](https://www.ssw.com.au
 William has spoken at conferences such as:
 
 * [NDC Sydney](https://ndcsydney.com/speakers/william-liebenberg/)
-* [NDC Melbourne](https://ndcmelbourne.com/speakers/william-liebenberg/)
+* [NDC Melbourne](https://ndcmelbourne.com/)
 * [DDD Brisbane](https://dddbrisbane.com/agenda/2019)
 * [Global AI on Tour - Melbourne](https://globalai.community/events/global-ai-on-tour-june-2021)