Documentation: update stable tree link

The link to stable tree is redirected to
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git. Update
accordingly.

Cc: Greg Kroah-Hartman <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Bagas Sanjaya <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: bagasme

Documentation/process/stable-kernel-rules.rst

@@ -170,7 +170,7 @@ Trees
  - The finalized and tagged releases of all stable kernels can be found
    in separate branches per version at:
 
-	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
+	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
 
  - The release candidate of all stable kernel versions can be found at: