Bump cmd-help syntax to latest

Manual update (as opposed to Dependabot's) because the highlighting for
the test help message has changed. It's all good because it's as
intended, an improvement.

See victor-gp/cmd-help-sublime-syntax#23

CHANGELOG.md

@@ -21,6 +21,8 @@
 
 ## Syntaxes
 
+- `cmd-help`: scope subcommands followed by other terms, and other misc improvements, see #2819 (@victor-gp)
+
 ## Themes
 
 ## `bat` as a library

tests/syntax-tests/highlighted/cmd-help/test.cmd-help

@@ -4,8 +4,8 @@
 Use '--help' instead of '-h' to see a more detailed version of the help text.
 
 USAGE:
-    bat [OPTIONS] [FILE]...
-    bat <SUBCOMMAND>
+    bat [OPTIONS] [FILE]...
+    bat <SUBCOMMAND>
 
 ARGS:
     <FILE>...    File(s) to print / concatenate. Use '-' for standard input.