Update Kotlin to v2.0.21 (#424)

renovate[bot] · web-flow · commit 28c1a0c164da · 2024-10-12T12:18:26.000Z
Co-authored-by: renovate[bot] &lt;29139614+renovate[bot]@users.noreply.github.com&gt;
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 agp = "8.7.0"
-kotlin = "2.0.20"
+kotlin = "2.0.21"
 ktlint = "0.48.1"
 
 [libraries]
