worktree add: include -B in usage docs

Document `-B` next to where `-b` is already documented to bring the
usage docs in line with other commands such as git checkout.

Signed-off-by: Jacob Abel <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: OneDeuxTriSeiGo

Documentation/git-worktree.txt

@@ -10,7 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git worktree add' [-f] [--detach] [--checkout] [--lock [--reason <string>]]
-		   [-b <new-branch>] <path> [<commit-ish>]
+		   [(-b | -B) <new-branch>] <path> [<commit-ish>]
 'git worktree list' [-v | --porcelain [-z]]
 'git worktree lock' [--reason <string>] <worktree>
 'git worktree move' <worktree> <new-path>

builtin/worktree.c

@@ -22,7 +22,7 @@
 
 #define BUILTIN_WORKTREE_ADD_USAGE \
 	N_("git worktree add [-f] [--detach] [--checkout] [--lock [--reason <string>]]\n" \
-	   "                 [-b <new-branch>] <path> [<commit-ish>]")
+	   "                 [(-b | -B) <new-branch>] <path> [<commit-ish>]")
 #define BUILTIN_WORKTREE_LIST_USAGE \
 	N_("git worktree list [-v | --porcelain [-z]]")
 #define BUILTIN_WORKTREE_LOCK_USAGE \