Linux 5.19 compat: META

Update the META file to reflect compatibility with the 5.19 kernel.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13715

META

@@ -6,5 +6,5 @@ Release:       1
 Release-Tags:  relext
 License:       CDDL
 Author:        OpenZFS
-Linux-Maximum: 5.18
+Linux-Maximum: 5.19
 Linux-Minimum: 3.10