21898 - Fixed typo in help message

- Fixed variable typo in all files I could find it in

src/VisualStudio/Core/Def/ServicesVSResources.Designer.cs

@@ -2266,7 +2266,7 @@ internal class ServicesVSResources {
         ///2. Open a Visual Studio Developer Command Prompt
         ///3. Set environment variable “TraceDesignTime” to true (set TraceDesignTime=true)
         ///4. Delete .vs directory/.suo file
-        ///5. Restart VS from the command prompt you set the environment varaible (devenv)
+        ///5. Restart VS from the command prompt you set the environment variable (devenv)
         ///6. Open the solution
         ///7. Check '{0}' and look for the failed tasks (FAILED).
         /// </summary>

src/VisualStudio/Core/Def/ServicesVSResources.resx

@@ -654,7 +654,7 @@ Use the dropdown to view and switch to other projects this file may belong to.</
 2. Open a Visual Studio Developer Command Prompt
 3. Set environment variable “TraceDesignTime” to true (set TraceDesignTime=true)
 4. Delete .vs directory/.suo file
-5. Restart VS from the command prompt you set the environment varaible (devenv)
+5. Restart VS from the command prompt you set the environment variable (devenv)
 6. Open the solution
 7. Check '{0}' and look for the failed tasks (FAILED)</value>
   </data>