chore: upgrade fastify #3321

Job	Run time
lint	1m 36s
test-snp	1m 29s
test (bns-e2e)	6h 5m 0s
test (event-replay)	1m 49s
test (bns)	6h 5m 1s
test-2_5 (pox-4-btc-address-formats)	1m 21s
test-2_5 (faucet-stx)	1m 16s
test-2_5 (pox-4-burnchain-stack-stx)	1m 13s
test-2_5 (pox-4-burnchain-delegate-stx)	1m 23s
test-2_5 (pox-4-stack-extend-increase)	1m 17s
test-2_5 (pox-4-delegate-stacking)	1m 15s
test-2_5 (block-zero-handling)	2m 8s
test-2_5 (pox-4-delegate-revoked-stacking)	1m 15s
test (api)	6h 5m 0s
test (rpc)	1m 49s
test-2_5 (pox-4-delegate-aggregation)	1m 15s
test (btc-faucet)	1m 26s
semantic-release	0s
build-publish	0s
	18h 35m 33s

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