Update org.mockito to 4.8.0

Closes gh-11849

Author: Steve Riesenberg

dependencies/spring-security-dependencies.gradle

@@ -11,7 +11,7 @@ dependencies {
 	api platform("io.projectreactor:reactor-bom:2020.0.23")
 	api platform("io.rsocket:rsocket-bom:1.1.3")
 	api platform("org.junit:junit-bom:5.9.0")
-	api platform("org.mockito:mockito-bom:4.7.0")
+	api platform("org.mockito:mockito-bom:4.8.0")
 	api platform("org.springframework.data:spring-data-bom:2021.2.2")
 	api platform("org.jetbrains.kotlin:kotlin-bom:$kotlinVersion")
 	api platform("org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.6.4")