docs: clarify file options in git-config --edit

The description for the `-e`/`--edit` option references scopes
inconsistently: system and global are referenced by their option name
(`--system`/`--global`), but repository (`--local` is not. Additionally,
neither `--worktree` nor `--file` are referenced at all, despite also
being a valid options.

Update the description to mention all four available scopes as well as
`--file`, referencing each consistently by their option name.

Signed-off-by: Brian Lyles <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: zivarah

Documentation/git-config.txt

@@ -275,7 +275,8 @@ Valid `<type>`'s include:
 -e::
 --edit::
 	Opens an editor to modify the specified config file; either
-	`--system`, `--global`, or repository (default).
+	`--system`, `--global`, `--local` (default), `--worktree`, or
+	`--file <config-file>`.
 
 --[no-]includes::
 	Respect `include.*` directives in config files when looking up