Bump kotlin-stdlib from 1.4.21 to 1.4.21-2 (#734)

Bumps [kotlin-stdlib](https://github.com/JetBrains/kotlin) from 1.4.21 to 1.4.21-2.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.4.21...v1.4.21-2)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

uhabits-core/build.gradle.kts

@@ -45,7 +45,7 @@ kotlin {
                 implementation(kotlin("stdlib-jdk8"))
                 compileOnly("com.google.dagger:dagger:2.31.2")
                 implementation("com.google.guava:guava:30.0-jre")
-                implementation("org.jetbrains.kotlin:kotlin-stdlib:1.4.21")
+                implementation("org.jetbrains.kotlin:kotlin-stdlib:1.4.21-2")
                 implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.4.2")
                 implementation("androidx.annotation:annotation:1.1.0")
                 implementation("com.google.code.findbugs:jsr305:3.0.2")