fix(deps): update dependency au.com.dius.pact.provider:spring6 to v4.6.18

Ref: PACT-445

Author: pactflow-renovate-bot[bot]

build.gradle

@@ -26,7 +26,7 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 	testImplementation 'au.com.dius.pact.provider:junit:4.6.18'
 	testImplementation 'au.com.dius.pact.provider:junit5:4.6.18'
-	testImplementation 'au.com.dius.pact.provider:spring6:4.6.17'
+	testImplementation 'au.com.dius.pact.provider:spring6:4.6.18'
 
 	runtimeOnly 'com.h2database:h2'
   compileOnly 'org.projectlombok:lombok'