Update heroku/buildpacks-jvm to v3.1.0 #535

Job	Run time
create (buildpacks-20)	1m 37s
create (builder-classic-22)	1m 18s
create (builder-22)	1m 30s
test-functions (builder-22, java)	1m 18s
test-functions (builder-22, javascript)	1m 12s
test-guides (buildpacks-20, go)	1m 31s
test-guides (buildpacks-20, gradle)	2m 27s
test-functions (builder-22, typescript)	1m 49s
test-guides (buildpacks-20, java)	1m 41s
test-guides (buildpacks-20, node-js)	1m 28s
test-guides (buildpacks-20, php)	1m 5s
test-guides (buildpacks-20, python)	1m 38s
test-guides (buildpacks-20, ruby)	2m 50s
test-guides (buildpacks-20, scala)	3m 19s
test-guides (buildpacks-20, typescript)	1m 12s
test-guides (builder-classic-22, go)	1m 45s
test-guides (builder-classic-22, gradle)	2m 8s
test-guides (builder-classic-22, java)	1m 25s
test-guides (builder-classic-22, node-js)	1m 23s
test-guides (builder-classic-22, php)	1m 3s
test-guides (builder-classic-22, python)	1m 27s
test-guides (builder-classic-22, ruby)	2m 46s
test-guides (builder-classic-22, scala)	2m 25s
test-guides (builder-classic-22, typescript)	1m 7s
test-guides (builder-22, go)	1m 24s
test-guides (builder-22, gradle)	2m 4s
test-guides (builder-22, java)	1m 24s
test-guides (builder-22, node-js)	54s
test-guides (builder-22, php)	1m 0s
test-guides (builder-22, python)	1m 13s
test-guides (builder-22, ruby)	2m 23s
test-guides (builder-22, scala)	1m 59s
test-guides (builder-22, typescript)	1m 11s
test-guides (builder-classic-22, clojure)	2m 12s
publish	0s
	57m 8s

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