docs: update Git placeholder version for NTLM disabled

Update the placeholder Git for Windows version number in the note about
NTLM being disabled by default. Git for Windows 2.53.0.2 is the first
version where NTLM is disabled.

Signed-off-by: Matthew John Cheetham <mjcheetham@outlook.com>

Author: mjcheetham

docs/ntlm-kerberos.md

@@ -62,7 +62,9 @@ Provider Interface) to perform NTLM and Kerberos authentication. This allows Git
 to integrate seamlessly with the Windows authentication infrastructure.
 
 > [!NOTE]
-> As of Git for Windows version 2.XX.X, **NTLM support is disabled by default**.
+> As of Git for Windows version 2.53.0.2, **NTLM support is disabled by
+> default**.
+>
 > Kerberos support _remains enabled_.
 
 ### Re-enabling NTLM Support