Gradle: Bump kotlinx-coroutines-core

Bumps [kotlinx-coroutines-core](https://github.com/Kotlin/kotlinx.coroutines) from 1.6.1-native-mt to 1.6.3-native-mt.
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](https://github.com/Kotlin/kotlinx.coroutines/commits)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-coroutines-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -170,7 +170,7 @@ subprojects {
 
     implementation("org.jetbrains.kotlin:kotlin-reflect")
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.1-native-mt")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.3-native-mt")
 
     implementation(
         platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES))