Bump protobufs #918

Job	Run time
Check code formatting	4s
Clippy (libsignal-service-actix)	1m 19s
Clippy (libsignal-service-hyper)	1m 17s
Build (libsignal-service-actix, Rust stable)	1m 44s
Clippy (libsignal-service-hyper, unsend-futures)	1m 10s
Build (libsignal-service-actix, Rust beta)	1m 47s
Clippy (libsignal-service)	1m 3s
Build (libsignal-service-actix, Rust nightly)	4m 13s
Clippy (libsignal-service, unsend-futures)	1m 7s
Build (libsignal-service-hyper, Rust stable)	2m 6s
Build (libsignal-service-hyper, Rust stable)	1m 23s
Build (libsignal-service-hyper, Rust beta)	1m 30s
Build (libsignal-service-hyper, Rust nightly)	3m 52s
Build (libsignal-service, Rust stable)	2m 4s
Build (libsignal-service, Rust stable)	1m 41s
Build (libsignal-service, Rust beta)	1m 15s
Build (libsignal-service, Rust nightly)	3m 29s
Build (libsignal-service-actix, Rust 1.75)	2m 9s
	33m 13s

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