fix(deps): Update junit to v6.0.3

Author: cq-bot

lib/build.gradle

@@ -46,9 +46,9 @@ dependencies {
 
     testImplementation 'io.grpc:grpc-testing:1.79.0'
     testImplementation 'io.grpc:grpc-inprocess:1.79.0'
-    testImplementation platform('org.junit:junit-bom:6.0.2')
-    testImplementation 'org.junit.jupiter:junit-jupiter:6.0.2'
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:6.0.2'
+    testImplementation platform('org.junit:junit-bom:6.0.3')
+    testImplementation 'org.junit.jupiter:junit-jupiter:6.0.3'
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:6.0.3'
     testImplementation 'org.mockito:mockito-core:5.21.0'
     testImplementation 'org.mockito:mockito-junit-jupiter:5.21.0'
     testImplementation 'nl.jqno.equalsverifier:equalsverifier:4.3.1'