chore: bump kotlin-gradle-plugin

Bumps [kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.7.20 to 1.8.0.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.7.20...v1.8.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

core-sdk-samples/higgs-shop-sample-app/build.gradle.kts

@@ -7,7 +7,7 @@ buildscript {
     }
     dependencies {
         classpath("com.android.tools.build:gradle:7.4.0")
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.0")
         classpath("com.google.gms:google-services:4.3.15")
     }
 }