fix(deps): update dependency au.com.dius.pact.provider:spring6 to v4.6.20 (#95)

Ref: PACT-445

Co-authored-by: pactflow-renovate-bot[bot] <186667433+pactflow-renovate-bot[bot]@users.noreply.github.com>

Author: pactflow-renovate-bot[bot]

build.gradle

@@ -30,7 +30,7 @@ dependencies {
 	annotationProcessor 'org.projectlombok:lombok'
 
 	testImplementation 'au.com.dius.pact.provider:junit5:4.6.20'
-	testImplementation 'au.com.dius.pact.provider:spring6:4.6.19'
+	testImplementation 'au.com.dius.pact.provider:spring6:4.6.20'
 	testImplementation 'org.apache.commons:commons-lang3:3.20.0'
 	testImplementation('org.springframework.boot:spring-boot-starter-test') {
 		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'