benches: bump `pprof` to v0.14 (#554) #953

Job	Run time
build (1.81.0, thumbv7em-none-eabi)	16s
test (1.81.0)	17s
build (1.81.0, wasm32-unknown-unknown)	17s
test (stable)	19s
build (stable, thumbv7em-none-eabi)	20s
build (stable, wasm32-unknown-unknown)	25s
minimal-versions / minimal-versions	32s
	2m 26s

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