ci: slient curl when uploading benchmark datapoint #4

Job	Run time
benchmark (solana-sdk, cargo +$rust_nightly bench -p solana-sdk -- -Z unstable-options --format=j...	1m 40s
benchmark (solana-runtime, cargo +$rust_nightly bench -p solana-runtime -- -Z unstable-options --...	1m 37s
benchmark (solana-gossip, cargo +$rust_nightly bench -p solana-gossip -- -Z unstable-options --fo...	3m 18s
benchmark (solana-poh, cargo +$rust_nightly bench -p solana-poh -- -Z unstable-options --format=j...	1m 33s
benchmark (solana-core, cargo +$rust_nightly bench -p solana-core -- -Z unstable-options --format...	6m 14s
benchmark (solana-accounts-db, cargo +$rust_nightly bench -p solana-accounts-db -- -Z unstable-op...	5m 14s
benchmark (sbf, make -C programs/sbf all, cargo +$rust_nightly bench --manifest-path programs/sbf...	1m 37s
	21m 13s

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