Mention of deprecated symbols in 101 samples

Hello,
I am starting to learn the libgit2 API and in the first example I wanted to try I stumbled upon git_indexer_progress: https://libgit2.org/docs/guides/101-samples/#repositories_clone_progress.
Unfortunately, this does not appear anywhere in the reference: https://libgit2.org/libgit2/#HEAD/search/git_transfer_progress.
Further investigation showed that it is simply because it is a deprecated name of git_indexer_progress.

So, I will definitely do a PR for this particular instance, but it would be nice to be able to catch all such symbols automatically if possible.

Do you think there would be a reliable way to do so, or we should try to parse the "deprecated" header ?

从 101 samples page 开始，尤其是 repositories_clone_progress example，并将其中的符号与 libgit2 reference search 进行比较。调查是否可以可靠地从 deprecated header 中检测 deprecated names。完成的标准是确定受影响的 samples，并记录一种可维护的处理方法。