Bump com.jetbrains.rd:rd-gen from 2026.2.0 to 2026.2.1

Bumps [com.jetbrains.rd:rd-gen](https://github.com/JetBrains/rd) from 2026.2.0 to 2026.2.1.
- [Release notes](https://github.com/JetBrains/rd/releases)
- [Commits](JetBrains/rd@2026.2.0...2026.2.1)

---
updated-dependencies:
- dependency-name: com.jetbrains.rd:rd-gen
  dependency-version: 2026.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlin = "2.3.21" # https://plugins.jetbrains.com/docs/intellij/using-kotlin.html#kotlin-standard-library
-rdGen = "2026.2.0" # https://github.com/JetBrains/rd/releases
+rdGen = "2026.2.1" # https://github.com/JetBrains/rd/releases
 
 [libraries]
 kotlinStdLib = { group = "org.jetbrains.kotlin", name = "kotlin-stdlib", version.ref = "kotlin" }