Bump postcss from 8.4.28 to 8.4.31 in /test/frameworks/remix-indie (#88) #431

Job	Run time
test	23s
test-alpine (alpine)	23s
test-frameworks-yarn3 (next-yarn3)	1m 9s
test-frameworks (express)	36s
test-frameworks (fastify)	49s
test-frameworks (gatsby)	1m 38s
test-frameworks (nest)	51s
test-frameworks (next-yarn)	1m 15s
test-frameworks (nuxt)	1m 28s
test-frameworks (remix-indie)	2m 0s
test-frameworks (adonisjs)	1m 50s
	12m 22s

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