Auto merge of #12251 - c-git:patch-1, r=weihanglo

docs: clarify the use of `default` branch instead of `main` by default

Update specifying-dependencies.md to show not specifying the branch for git doesn't always use the main branch.

src/doc/src/reference/specifying-dependencies.md

@@ -140,7 +140,8 @@ Cargo will fetch the `git` repository at this location then look for a
 of a workspace and setting `git` to the repository containing the workspace).
 
 Since we haven’t specified any other information, Cargo assumes that
-we intend to use the latest commit on the main branch to build our package.
+we intend to use the latest commit on the default branch branch 
+to build our package, which may not necessarily be the main branch.
 You can combine the `git` key with the `rev`, `tag`, or `branch` keys to
 specify something else. Here's an example of specifying that you want to use
 the latest commit on a branch named `next`: