cmd: fix session recording download flag help (#3351)

When using an alias, we automatically add a little
blurb to the end of the flag help. When not terminating
the flag help with a full stop, this looks a bit odd. Add
full stops to all the download flags for consistency.

internal/cmd/commands/sessionrecordingscmd/download.go

@@ -54,18 +54,18 @@ func (c *DownloadCommand) Flags() *base.FlagSets {
 	f.StringVar(&base.StringVar{
 		Name:   "id",
 		Target: &c.FlagId,
-		Usage:  "The id of the session recording resource to download",
+		Usage:  "The id of the session recording resource to download.",
 	})
 	f.StringVar(&base.StringVar{
 		Name:    "output",
 		Target:  &c.FlagOutputFile,
-		Usage:   "An optional output file for the download. If not provided the recording id will be used with a \".cast\" extension. Use \"-\" for stdout",
+		Usage:   "An optional output file for the download. If not provided the recording id will be used with a \".cast\" extension. Use \"-\" for stdout.",
 		Aliases: []string{"o"},
 	})
 	f.BoolVar(&base.BoolVar{
 		Name:    "no-clobber",
 		Target:  &c.FlagNoClobber,
-		Usage:   "An option to stop downloads that would overwrite existing files",
+		Usage:   "An option to stop downloads that would overwrite existing files.",
 		Aliases: []string{"nc"},
 	})
 	return set