doc: add "git switch -c" as another option on detached HEAD

In the "DETACHED HEAD" section in the git-checkout doc, it suggests
using "git checkout -b <branch-name>" to create a new branch on the
detached head.

On the other hand, when you checkout a commit that is not at the tip of
any named branch (e.g., when you checkout a tag), git suggests using
"git switch -c <branch-name>".

Add "git switch -c" as another option and mitigate this inconsistency.

Signed-off-by: Yutaro Ohno <[email protected]>
Acked-by: Eric Sunshine <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ohno418

Documentation/git-checkout.txt

@@ -477,9 +477,9 @@ before that happens. If we have not yet moved away from commit `f`,
 any of these will create a reference to it:
 
 ------------
-$ git checkout -b foo   <1>
-$ git branch foo        <2>
-$ git tag foo           <3>
+$ git checkout -b foo  # or "git switch -c foo"  <1>
+$ git branch foo                                 <2>
+$ git tag foo                                    <3>
 ------------
 
 <1> creates a new branch `foo`, which refers to commit `f`, and then