fix(deps): update dependency org.junit:junit-bom to v5.14.0 (open-telemetry#2331)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts

@@ -150,7 +150,7 @@ testing {
     dependencies {
       implementation(project(project.path))
 
-      implementation(enforcedPlatform("org.junit:junit-bom:5.13.4"))
+      implementation(enforcedPlatform("org.junit:junit-bom:5.14.0"))
       implementation(enforcedPlatform("org.testcontainers:testcontainers-bom:1.21.3"))
       implementation(enforcedPlatform("com.google.guava:guava-bom:33.5.0-jre"))
       implementation(enforcedPlatform("com.linecorp.armeria:armeria-bom:1.33.4"))