Bump kotlin.version from 2.3.10 to 2.3.20

Bumps `kotlin.version` from 2.3.10 to 2.3.20.

Updates `org.jetbrains.kotlin:kotlin-maven-allopen` from 2.3.10 to 2.3.20

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.3.10 to 2.3.20

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-maven-allopen
  dependency-version: 2.3.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-version: 2.3.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

grpc-locations/pom.xml

@@ -10,7 +10,7 @@
   <properties>
     <assertj.version>3.27.7</assertj.version>
     <compiler-plugin.version>3.15.0</compiler-plugin.version>
-    <kotlin.version>2.3.10</kotlin.version>
+    <kotlin.version>2.3.20</kotlin.version>
     <maven.compiler.release>21</maven.compiler.release>
     <mockk.version>3.1.0</mockk.version>
     <jacoco.version>0.8.14</jacoco.version>