Fix incorrect limitCount argument format for git log

[prjanitor]

The -n argument for limiting the number of commits was incorrectly formatted as a single string '-n ${limitCount}'. When using child_process.spawn, each element in the args array is treated as a single token. This resulted in an invalid argument like '-n 10' being passed to git instead of -n and 10 as separate tokens.

This PR separates -n and its value into distinct elements in the arguments array to ensure correct command execution.

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