[clang-tools-extra] [clangd] Correctly identify the next token after the completion point (PR #69153)

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zyn0217 wrote:

(Maybe this is the reason: https://github.com/llvm/llvm-project/commit/cefc31c9213a82879254006ef479ed5ef6af7e69. Only top-100 commits are fetched by the CI currently. And sorry for bikeshedding the PR)

https://github.com/llvm/llvm-project/pull/69153