chore(deps): bump hashbrown to 0.15 #2066

Job	Run time
miri --no-default-features	4m 46s
miri	4m 40s
test ubuntu-latest stable --no-default-features	1m 3s
test ubuntu-latest stable	1m 2s
test ubuntu-latest nightly --no-default-features	51s
check no_std	35s
miri --all-features	6m 37s
test ubuntu-latest nightly	46s
test ubuntu-latest 1.79 --no-default-features	27s
clippy	49s
test ubuntu-latest 1.79	30s
docs	31s
test windows-latest stable --no-default-features	1m 54s
test windows-latest stable	2m 41s
wasm	34s
test windows-latest nightly --no-default-features	1m 53s
features stable	1m 25s
test windows-latest nightly	2m 10s
features stable --all-targets	2m 45s
features nightly	1m 26s
test windows-latest 1.79 --no-default-features	1m 13s
features nightly --all-targets	2m 33s
test windows-latest 1.79	1m 27s
test ubuntu-latest 1.79 --features json	30s
test windows-latest 1.79 --features json	1m 16s
fmt	12s
test ubuntu-latest nightly --all-features	1m 6s
test windows-latest nightly --all-features	2m 28s
	48m 10s

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