Update org.springframework.data to 2020.0.0

Closes gh-9716

Author: rwinch

dependencies/spring-security-dependencies.gradle

@@ -10,7 +10,7 @@ dependencies {
 	api platform("org.springframework:spring-framework-bom:5.3.6")
 	api platform("io.projectreactor:reactor-bom:2020.0.6")
 	api platform("io.rsocket:rsocket-bom:1.1.0")
-	api platform("org.springframework.data:spring-data-bom:2020.0.7")
+	api platform("org.springframework.data:spring-data-bom:2021.0.0")
 	api platform("org.jetbrains.kotlin:kotlin-bom:$kotlinVersion")
 	api platform("org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.4.3")
 	api platform("com.fasterxml.jackson:jackson-bom:2.12.3")