Add 7.1 Updaet 3 help

Author: Peter-Simpson

Help/ASCOMDeveloper.content

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Topics>
-  <Topic id="7d9253c2-fdfd-4c0d-8225-a96bddb49731" visible="True" isDefault="true" isSelected="true" title="ASCOM Platform 7.1 Update 2" tocTitle="Introduction" />
+  <Topic id="7d9253c2-fdfd-4c0d-8225-a96bddb49731" visible="True" isDefault="true" title="ASCOM Platform 7.1 Update 2" tocTitle="Introduction" />
   <Topic id="6cdc126a-3b1a-4a55-836f-aaf704740a33" visible="True" title="Introduction - ASCOM Platform 7  For Developers" tocTitle="Introduction - Developers" />
   <Topic id="174fff87-9bd7-442e-98e1-9fe2ac09bac6" visible="True" />
   <Topic id="3d17234a-c873-4f65-af0f-52f182081a44" visible="True" title="ASCOM Platform for .NET Developers" />
   <Topic id="bfd53b69-9f13-489b-9a98-50c60d2a633b" visible="True" isExpanded="true" title="Version History">
+    <Topic id="Version_7.1.3" visible="True" isSelected="true" />
     <Topic id="Version_7.1.2" visible="True" />
     <Topic id="1d9c9d1e-1980-45a6-b7f9-4f4bcb752b80" visible="True" title="Version 7.1 Update 1" />
     <Topic id="1cff238c-4522-4730-ae94-a82f9666654e" visible="True" title="Version 7.1" />

Help/ASCOMDeveloper.shfbproj

@@ -365,6 +365,7 @@
     <None Include=".ProjectOverrides\VS2013ChmHelpFormat.proj" />
     <None Include=".ProjectOverrides\VS2013HtmlHelpFormat.proj" />
     <None Include=".ProjectOverrides\VS2022HtmlHelpFormat.proj" />
+    <None Include="Version History\Version 7.1 Update 3.md" />
     <None Include="Developer Information\Astronomical Coordinates.aml" />
     <None Include="Developer Information\ConnectionProtocol.aml" />
     <None Include="Developer Information\Developer Links.aml" />

Help/Version History/Version 7.1 Update 3.md

@@ -0,0 +1,18 @@
+---
+uid: Version_7.1.3
+title: ASCOM Platform 7.1 Update 3
+tocTitle: Version 7.1 Update 3
+# linkText: Optional Text to Use For Links
+# keywords: keyword, term 1, term 2, "term, with comma"
+# alt-uid: optional-alternate-id
+# summary: Optional summary abstract
+---
+In line with previous Platform installers, Platform 7.1 Update 3 is a cumulative release that contains all enhancements and fixes from previous 
+Platform releases and service packs. The Platform environment pre-requisites are listed 
+here <link xlink:href="7d9253c2-fdfd-4c0d-8225-a96bddb49731#PreReqs70">Platform Prerequisites</link>.
+
+## Issues Fixed in 7.1 Update 3 - For Everyone
+* Fixed - TraceLogger occasionally threw `ProfilePersistenceException - Timed out waiting for TraceLogger mutex` exceptions.
+
+## Changes in 7.1 Update 2
+See this link for changes and fixes in Platform 7.1 Update 2: <link xlink:href="Version_7.1.2">