Upgrade to Spring Boot 2.4.12.

Author: jxblum

gradle.properties

@@ -10,7 +10,7 @@ multithreadedtcVersion=1.01
 pivotalCloudCacheVersion=1.13.3
 pivotalGemFireVersion=9.10.9
 springVersion=5.3.12
-springBootVersion=2.4.12-SNAPSHOT
+springBootVersion=2.4.12
 springCloudBindingsVersion=1.7.1
 springDataBomVersion=2020.0.13
 springDataGeodeVersion=2.4.13