Update launch.cpp help text

Minor update to add a missing "." at the end of the help text for the --mount option.

Signed-off-by: Giulia Zanchi <[email protected]>

src/client/cli/cmd/launch.cpp

@@ -235,7 +235,7 @@ mp::ParseCode cmd::Launch::parse_args(mp::ArgParser* parser)
     QCommandLineOption mountOption("mount",
                                    "Mount a local directory inside the instance. If <target> is omitted, the "
                                    "mount point will be under /home/ubuntu/<source-dir>, where <source-dir> is "
-                                   "the name of the <source> directory",
+                                   "the name of the <source> directory.",
                                    "source>:<target");
 
     parser->addOptions({cpusOption, diskOption, memOption, memOptionDeprecated, nameOption, cloudInitOption,