Bump buildpacks/gradle/test-apps/heroku-gradle-getting-started (#740) #918

Job	Run time
Unit Tests	25s
Integration Tests (buildpacks/gradle, builder:24, amd64)	2m 14s
Integration Tests (buildpacks/jvm, builder:24, amd64)	1m 8s
Integration Tests (buildpacks/maven, builder:24, amd64)	2m 32s
Rust Code Linting	26s
Integration Tests (buildpacks/sbt, builder:24, amd64)	4m 21s
Integration Tests (buildpacks/gradle, builder:24, arm64)	3m 40s
Integration Tests (buildpacks/jvm, builder:24, arm64)	2m 14s
Integration Tests (buildpacks/maven, builder:24, arm64)	3m 30s
Integration Tests (buildpacks/sbt, builder:24, arm64)	5m 9s
Integration Tests (buildpacks/gradle, builder:22, amd64)	2m 10s
Integration Tests (buildpacks/jvm, builder:22, amd64)	1m 21s
Integration Tests (buildpacks/jvm-function-invoker, builder:22, amd64)	1m 26s
Integration Tests (buildpacks/maven, builder:22, amd64)	2m 28s
Integration Tests (buildpacks/sbt, builder:22, amd64)	4m 20s
Integration Tests (buildpacks/gradle, builder:20, amd64)	2m 31s
Integration Tests (buildpacks/jvm, builder:20, amd64)	1m 13s
Integration Tests (buildpacks/maven, builder:20, amd64)	2m 36s
Integration Tests (buildpacks/sbt, builder:20, amd64)	4m 22s
	48m 6s

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