Fix casing of Windows. (#13149)

Author: sean-mcmanus

Diff for: Extension/walkthrough/devcommandprompt/open-developer-command-prompt.md

@@ -1,5 +1,5 @@
 <h1 data-loc-id="walkthrough.windows.title.open.dev.command.prompt">Relaunch using the <span>Developer Command Prompt for VS</span></h1>
-<p data-loc-id="walkthrough.windows.background.dev.command.prompt"> You are using a windows machine with the MSVC compiler, so you need to start VS Code from the <span>Developer Command Prompt for VS</span> for all environment variables to be set correctly. To relaunch using the <span>Developer Command Prompt for VS</span>:</p>
+<p data-loc-id="walkthrough.windows.background.dev.command.prompt"> You are using a Windows machine with the MSVC compiler, so you need to start VS Code from the <span>Developer Command Prompt for VS</span> for all environment variables to be set correctly. To relaunch using the <span>Developer Command Prompt for VS</span>:</p>
 <ol>
 <li><p data-loc-id="walkthrough.open.command.prompt">Open the <span>Developer Command Prompt for VS</span> by typing "<span>developer</span>" in the Windows Start menu. Select the <span>Developer Command Prompt for VS</span>, which will automatically navigate to your current open folder.</p>
 </li>