Spring to Boot 2.7.8

Closes gh-2236

Author: rwinch

build.gradle

@@ -4,7 +4,7 @@ buildscript {
 		snapshotBuild = version.endsWith('SNAPSHOT')
 		milestoneBuild = !(releaseBuild || snapshotBuild)
 
-		springBootVersion = '2.7.0-M3'
+		springBootVersion = '2.7.8'
 	}
 
 	repositories {

spring-session-samples/gradle/dependency-management.gradle

@@ -9,7 +9,7 @@ dependencyManagement {
 		dependency 'javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api:1.2.2'
 		dependency 'javax.servlet.jsp:javax.servlet.jsp-api:2.3.3'
 		dependency 'org.apache.taglibs:taglibs-standard-jstlel:1.2.5'
-		dependency 'org.seleniumhq.selenium:htmlunit-driver:3.60.0'
+		dependency 'org.seleniumhq.selenium:htmlunit-driver:3.61.0'
 		dependency 'org.slf4j:jcl-over-slf4j:1.7.36'
 		dependency 'org.slf4j:log4j-over-slf4j:1.7.36'
 		dependency 'org.webjars:bootstrap:2.3.2'