Bump io.gatling.highcharts:gatling-charts-highcharts (#31)

Bumps [io.gatling.highcharts:gatling-charts-highcharts](https://github.com/gatling/gatling-highcharts) from 3.11.5 to 3.12.0.
- [Commits](gatling/gatling-highcharts@v3.11.5...v3.12.0)

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

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

Author: dependabot[bot]

pom.xml

@@ -9,7 +9,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <gatling.version>3.11.5</gatling.version>
+    <gatling.version>3.12.0</gatling.version>
     <gatling-maven-plugin.version>4.9.6</gatling-maven-plugin.version>
     <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
     <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>