Update to Spring Data BOM 2021.0.8

Closes gh-625

Author: jzheaux

dependencies/build.gradle

@@ -18,7 +18,7 @@ dependencies {
 	api platform("io.projectreactor:reactor-bom:2020.0.12")
 	api platform("io.rsocket:rsocket-bom:1.1.1")
 	api platform("org.junit:junit-bom:5.8.1")
-	api platform("org.springframework.data:spring-data-bom:2022.1.0-SNAPSHOT")
+	api platform("org.springframework.data:spring-data-bom:2021.0.8")
 	api platform("com.fasterxml.jackson:jackson-bom:2.13.0")
 	api platform("org.junit:junit-bom:5.8.1")
 	constraints {