Keep c#, c++ and f# as the language of Markdown code blocks - #18139

Failed to get file from ref "d891a2bb8a16ad7b742d489f48b961c52982cc5f:pnpm-lock.yaml": Error: Command failed: git show d891a2bb8a16ad7b742d489f48b961c52982cc5f:pnpm-lock.yaml fatal: path 'pnpm-lock.yaml' exists on disk, but not in 'd891a2bb8a16ad7b742d489f48b961c52982cc5f'

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