Update Path.GetTempPath description (#10118)

Author: adamsitnik

xml/System.IO/Path.xml

@@ -2298,25 +2298,17 @@ On .NET 7 and earlier versions, when using this method on Windows, the <xref:Sys
 
 The method does not verify that the path exists or test to see if the current process can access the path.
 
- This method checks for the existence of environment variables in the following order and returns the first path found:
-
 # [Windows](#tab/windows)
 
-1.  The path specified by the TMP environment variable.
-
-2.  The path specified by the TEMP environment variable.
-
-3.  The path specified by the USERPROFILE environment variable.
-
-4.  The Windows directory.
+If the current Windows version exposes the [`GetTempPath2`](https://learn.microsoft.com/windows/win32/api/fileapi/nf-fileapi-gettemppath2w) Win32 API, this method invokes that API and returns the resolved path. For more information on how this resolution is performed, including how to control the return value through the use of environment variables, see [the _Remarks_ section](https://learn.microsoft.com/windows/win32/api/fileapi/nf-fileapi-gettemppath2w#remarks) of the GetTempPath2 documentation. The GetTempPath2 API might not be available on all versions of Windows.
 
-In .NET 7 and later, when the process calling the method is running as `SYSTEM`, the method skips the preceding sequence and returns `C:\Windows\SystemTemp`. This location is inaccessible to processes not running as `SYSTEM`.
+On Windows versions that don't expose GetTempPath2, this method instead invokes the [`GetTempPath`](https://learn.microsoft.com/windows/win32/api/fileapi/nf-fileapi-gettemppathw) Win32 API and returns the resolved path. For more information on how this resolution is performed, including how to control the return value through the use of environment variables, see [the _Remarks_ section](https://learn.microsoft.com/windows/win32/api/fileapi/nf-fileapi-gettemppathw#remarks) of the GetTempPath documentation.
 
 # [Linux](#tab/linux)
 
-1.  The path specified by the TMPDIR environment variable.
+If the `TMPDIR` environment variable has been set, this method returns the value specified by that environment variable.
 
-2.  The path `/tmp/`.
+Otherwise, this method returns `/tmp/`.
 
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