match replacement rule is incorrect.

[JackyZh]

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in the 'for matches', replacement should be set as sourceValue,so if not match,sourceValue won`t be changed.
Configuration file (remove section, if not applicable):

# Insert the contents of your configuration file

Example log file (remove section, if not applicable):

# Insert some sample access logs that help reproduce the behavior
# IMPORANT: Please make sure to anonymize any PII like IP addresses and usernames!

Metrics output (remove section, if not applicable):

# Please post the output of the exporter's /metrics endpoint, if applicable

Exporter output (remove section, if not applicable):

# Please post the output of the exporter itself, if applicable

Environment:

• Exporter version:
• OS (e.g. from /etc/os-release):
• Deployment method (e.g. Docker image, deb/rpm package, self-compiled, ...):
• Others: