Update heroku/buildpacks-jvm to v3.1.0 #531

Job	Run time
create (buildpacks-20)	1m 33s
create (builder-classic-22)	1m 10s
create (builder-22)	1m 7s
test-functions (builder-22, java)	1m 19s
test-functions (builder-22, javascript)	1m 19s
test-guides (buildpacks-20, go)	1m 27s
test-functions (builder-22, typescript)	1m 30s
test-guides (buildpacks-20, gradle)	2m 25s
test-guides (buildpacks-20, java)	1m 27s
test-guides (buildpacks-20, node-js)	1m 9s
test-guides (buildpacks-20, php)	1m 20s
test-guides (buildpacks-20, python)	1m 33s
test-guides (buildpacks-20, ruby)	3m 24s
test-guides (buildpacks-20, scala)	2m 39s
test-guides (buildpacks-20, typescript)	1m 16s
test-guides (builder-classic-22, go)	1m 20s
test-guides (builder-classic-22, gradle)	3m 23s
test-guides (builder-classic-22, java)	1m 11s
test-guides (builder-classic-22, node-js)	1m 9s
test-guides (builder-classic-22, php)	56s
test-guides (builder-classic-22, python)	1m 10s
test-guides (builder-classic-22, ruby)	2m 42s
test-guides (builder-classic-22, scala)	2m 31s
test-guides (builder-classic-22, typescript)	1m 25s
test-guides (builder-22, go)	1m 15s
test-guides (builder-22, java)	1m 25s
test-guides (builder-22, node-js)	1m 1s
test-guides (builder-22, php)	3m 14s
test-guides (builder-22, python)	58s
test-guides (builder-22, ruby)	3m 12s
test-guides (builder-22, scala)	2m 1s
test-guides (builder-22, typescript)	1m 3s
test-guides (builder-classic-22, clojure)	1m 33s
publish	0s
	56m 7s

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