Bump kotlin-stdlib from 1.7.20 to 1.7.21

Bumps [kotlin-stdlib](https://github.com/JetBrains/kotlin) from 1.7.20 to 1.7.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -25,7 +25,7 @@ plugins {
 apply(plugin = "io.spring.dependency-management")
 
 dependencies {
-    implementation("org.jetbrains.kotlin:kotlin-stdlib:1.7.20")
+    implementation("org.jetbrains.kotlin:kotlin-stdlib:1.7.21")
 
     implementation("org.springframework.boot:spring-boot-starter-web")
     implementation("org.springframework.boot:spring-boot-starter-actuator")