Update heroku/buildpacks-ruby to v3.0.0 and add to builder-24 #1076

Job	Run time
create (builder-20, amd64)	1m 16s
create (builder-22, amd64)	56s
create (salesforce-functions, amd64)	46s
create (builder-24, amd64)	54s
create (builder-24, arm64)	1m 26s
test-functions (salesforce-functions, java)	41s
test-functions (salesforce-functions, javascript)	57s
test-guides (builder-20, go, amd64)	1m 3s
test-functions (salesforce-functions, typescript)	54s
test-guides (builder-20, gradle, amd64)	1m 50s
test-guides (builder-20, java, amd64)	1m 2s
test-guides (builder-20, node-js, amd64)	49s
test-guides (builder-20, php, amd64)	47s
test-guides (builder-20, python, amd64)	53s
test-guides (builder-20, ruby, amd64)	2m 19s
test-guides (builder-20, scala, amd64)	1m 48s
test-guides (builder-22, go, amd64)	59s
test-guides (builder-22, gradle, amd64)	1m 35s
test-guides (builder-22, java, amd64)	56s
test-guides (builder-22, node-js, amd64)	41s
test-guides (builder-22, php, amd64)	39s
test-guides (builder-22, python, amd64)	51s
test-guides (builder-22, ruby, amd64)	2m 2s
test-guides (builder-22, scala, amd64)	1m 41s
test-guides (builder-24, go, amd64)	52s
test-guides (builder-24, go, arm64)	1m 36s
test-guides (builder-24, python, amd64)	48s
test-guides (builder-24, python, arm64)	1m 24s
test-guides (builder-24, node-js, amd64)	47s
test-guides (builder-24, node-js, arm64)	1m 14s
test-guides (builder-24, ruby, amd64)	2m 12s
test-guides (builder-24, ruby, arm64)	2m 47s
publish-images	0s
publish-indices	0s
	39m 25s

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