[media] docs-rst: fix some .. note:: occurrences

On some places, either an space or the second ':' is missing.

Fix them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/v4l-drivers/zr364xx.rst

@@ -5,7 +5,7 @@ site: http://royale.zerezo.com/zr364xx/
 
 mail: royale@zerezo.com
 
-.. note:
+.. note::
 
    This documentation is outdated