docs: fixup 19.0.5 <> 19.0.6 confusion

The title of the release notes says 19.0.5 while the rest of the file
(correctly) says 19.0.6

Fixes: fe79d75ccf9 ("docs: Add relnotes for 19.0.6")
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Dylan Baker <dylan at pnwbakers.com>
1 file changed