Bump protobufs #953

Job	Run time
Clippy (libsignal-service-actix)	1m 17s
Build (libsignal-service-actix, Rust stable)	1m 42s
Check code formatting	4s
Clippy (libsignal-service-hyper)	1m 19s
Build (libsignal-service-actix, Rust beta)	1m 40s
Clippy (libsignal-service-hyper, unsend-futures)	1m 10s
Build (libsignal-service-actix, Rust nightly)	4m 1s
Clippy (libsignal-service)	1m 13s
Build (libsignal-service-hyper, Rust stable)	1m 30s
Clippy (libsignal-service, unsend-futures)	1m 3s
Build (libsignal-service-hyper, Rust stable)	1m 30s
Build (libsignal-service-hyper, Rust beta)	1m 31s
Build (libsignal-service-hyper, Rust nightly)	3m 44s
Build (libsignal-service, Rust stable)	1m 30s
Build (libsignal-service, Rust stable)	1m 7s
Build (libsignal-service, Rust beta)	1m 13s
Build (libsignal-service, Rust nightly)	3m 50s
Build (libsignal-service-actix, Rust 1.75)	1m 47s
	31m 11s

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