Update dependency io.gatling.highcharts:gatling-charts-highcharts to v3.11.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.gatling.highcharts:gatling-charts-highcharts (source)	3.11.3 -> 3.11.4

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Release Notes

gatling/gatling-highcharts (io.gatling.highcharts:gatling-charts-highcharts)

### [`v3.11.4`](https://togithub.com/gatling/gatling-highcharts/compare/v3.11.3...v3.11.4) [Compare Source](https://togithub.com/gatling/gatling-highcharts/compare/v3.11.3...v3.11.4)

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Configuration

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