Bump gradle-pitest-plugin from 1.9.0 to 1.9.11

Bumps [gradle-pitest-plugin](https://github.com/szpak/gradle-pitest-plugin) from 1.9.0 to 1.9.11.
- [Release notes](https://github.com/szpak/gradle-pitest-plugin/releases)
- [Changelog](https://github.com/szpak/gradle-pitest-plugin/blob/master/CHANGELOG.md)
- [Commits](szpak/gradle-pitest-plugin@release/1.9.0...release/1.9.11)

---
updated-dependencies:
- dependency-name: info.solidsoft.gradle.pitest:gradle-pitest-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

buildSrc/build.gradle.kts

@@ -7,5 +7,5 @@ repositories {
 }
 
 dependencies {
-  implementation("info.solidsoft.gradle.pitest:gradle-pitest-plugin:1.9.0")
+  implementation("info.solidsoft.gradle.pitest:gradle-pitest-plugin:1.9.11")
 }