Bump ls-qpack from `1bb5285` to `778b53d` #570

Job	Run time
Build (ubuntu, openssl, static, Debug)	1m 51s
Build (ubuntu, openssl, static, Release)	2m 13s
Build (ubuntu, openssl, shared, Debug)	1m 55s
Build (ubuntu, openssl, shared, Release)	1m 51s
Build (ubuntu, openssl3, static, Debug)	2m 15s
Build (ubuntu, openssl3, static, Release)	2m 11s
Build (ubuntu, openssl3, shared, Debug)	2m 9s
Build (ubuntu, openssl3, shared, Release)	2m 13s
Build (windows, schannel, static, Debug)	3m 33s
Build (windows, schannel, static, Release)	3m 53s
Build (windows, schannel, shared, Debug)	3m 22s
Build (windows, schannel, shared, Release)	3m 21s
Build (windows, openssl, static, Debug)	4m 28s
Build (windows, openssl, static, Release)	4m 40s
Build (windows, openssl, shared, Debug)	4m 46s
Build (windows, openssl, shared, Release)	4m 27s
Build (windows, openssl3, static, Debug)	5m 47s
Build (windows, openssl3, static, Release)	5m 26s
Build (windows, openssl3, shared, Debug)	4m 56s
Build (windows, openssl3, shared, Release)	5m 40s
Build Complete	5s
	1h 11m 2s

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