updateHostsFile.py: use a raw string for comment

This fixes a SyntaxWarning with Python 3.12:

```
 /home/runner/work/hosts/hosts/updateHostsFile.py:1386: SyntaxWarning: invalid escape sequence '\W'
  """
```

diff --git a/updateHostsFile.py b/updateHostsFile.py
index b250556ca94401afde421ac040abfbf66fcd7ea7..c31ed79bd3a09ea5dc676a137aa74f0142e00309 100755 (executable)
--- a/updateHostsFile.py
+++ b/updateHostsFile.py
@@ -1383,7 +1383,7 @@ def update_readme_data(readme_file, **readme_updates):
 
 
 def move_hosts_file_into_place(final_file):
-    """
+    r"""
     Move the newly-created hosts file into its correct location on the OS.
 
     For UNIX systems, the hosts file is "etc/hosts." On Windows, it's