[clang-tools-extra] Update http to https in clang-tidy check creation script. (PR #161326)

[Baranov Victor via cfe-commits]

vbvictor wrote:

I suppose we already have `https` in main:
https://github.com/llvm/llvm-project/blob/ff130f293dd7f9e280698b02066e8bf7116bcc3a/clang-tools-extra/clang-tidy/add_new_check.py#L111-L113

https://github.com/llvm/llvm-project/pull/161326