Raise minimum supported version of Gradle

Closes gh-41180

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/build.gradle

@@ -21,17 +21,6 @@ configurations {
 		extendsFrom dependencyManagement
 		transitive = false
 	}
-	all {
-		resolutionStrategy {
-			eachDependency { dependency ->
-				// Downgrade Spring Framework as Gradle cannot cope with 6.1.0-M1's
-				// multi-version jar files with bytecode in META-INF/versions/21
-				if (dependency.requested.group.equals("org.springframework")) {
-					dependency.useVersion("$springFramework60xVersion")
-				}
-			}
-		}
-	}
 }
 
 dependencies {