chore(deps-dev): bump io.gatling.highcharts:gatling-charts-highcharts (#455)

Bumps [io.gatling.highcharts:gatling-charts-highcharts](https://github.com/gatling/gatling-highcharts) from 3.10.3 to 3.10.4.
- [Commits](gatling/gatling-highcharts@v3.10.3...v3.10.4)

---
updated-dependencies:
- dependency-name: io.gatling.highcharts:gatling-charts-highcharts
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/gatling/pom.xml

@@ -13,7 +13,7 @@
   <properties>
     <java.version>21</java.version>
     <activiti-cloud.version>8.2.0</activiti-cloud.version>
-    <gatling.version>3.10.3</gatling.version>
+    <gatling.version>3.10.4</gatling.version>
     <gatling-maven-plugin.version>4.8.2</gatling-maven-plugin.version>
   </properties>