Update dependency com.google.devtools.ksp to v2.1.0-RC-1.0.26

gradle/libs.versions.toml

@@ -23,7 +23,7 @@ kotlin = "2.1.0-RC"
 kotlinx-coroutines = "1.9.0"
 kotlinx-datetime = "0.6.1"
 kotlinx-serialization = "1.7.3"
-ksp = "2.1.0-Beta2-1.0.26"
+ksp = "2.1.0-RC-1.0.26"
 ktor = "3.0.1"
 okhttp = "5.0.0-alpha.14"
 okio = "3.9.1"