Update dataframe bootstrap version to 0.9.0, update kotlin to 1.8.0

Author: Jolanrensen

gradle/libs.versions.toml

@@ -1,13 +1,13 @@
 [versions]
-ksp = "1.8.0-RC-1.0.8"
+ksp = "1.8.0-1.0.8"
 kotlinJupyter = "0.11.0-198"
 ktlint = "3.4.5"
-kotlin = "1.8.0-RC"
+kotlin = "1.8.0"
 dokka = "1.7.20"
 libsPublisher = "0.0.60-dev-30"
 # "Bootstrap" version of the dataframe, used in the build itself to generate @DataSchema APIs,
 # dogfood Gradle / KSP plugins in tests and idea-examples modules
-dataframe = "0.9.0-dev-1237"
+dataframe = "0.9.0"
 korro = "0.1.1-dev-29"
 kover = "0.6.0-Beta"