Merge pull request #95 from graphql-java-kickstart/renovate/spring-boot

chore(deps): update spring boot to v2.7.1

Author: oliemansm

gradle.properties

@@ -22,4 +22,4 @@ LIB_GRAPHQL_SERVLET_VER = 11.1.1
 
 ### Gradle Plugins
 
-LIB_SPRING_BOOT_VER = 2.6.6
+LIB_SPRING_BOOT_VER = 2.7.1