build(deps): bump org.jetbrains.intellij.platform from 2.5.0 to 2.6.0

Bumps org.jetbrains.intellij.platform from 2.5.0 to 2.6.0.

---
updated-dependencies:
- dependency-name: org.jetbrains.intellij.platform
  dependency-version: 2.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ opentest4j = "1.3.0"
 
 # plugins
 changelog = "2.2.1"
-intelliJPlatform = "2.5.0"
+intelliJPlatform = "2.6.0"
 kotlin = "2.1.21"
 kover = "0.9.1"
 qodana = "2025.1.1"