CI: Update `Dockerfile` to install OpenSSL 3 #260

Job	Run time
Build release artifacts	0s
Test (ubuntu-latest, stable)	34s
Test (ubuntu-latest, stable, native-tls, dhall)	33s
Test (ubuntu-latest, stable, rustls)	34s
Test (ubuntu-latest, beta)	35s
Test (ubuntu-latest, beta, native-tls, dhall)	35s
Test (ubuntu-latest, beta, rustls)	34s
Test (ubuntu-latest, nightly)	29s
Test (ubuntu-latest, nightly, native-tls, dhall)	27s
Test (ubuntu-latest, nightly, rustls)	20s
Test (macos-latest, stable)	1s
Test (macos-latest, stable, native-tls, dhall)	1s
Test (macos-latest, stable, rustls)	1s
Test (macos-latest, beta)	30s
Test (macos-latest, beta, native-tls, dhall)	24s
Test (macos-latest, beta, rustls)	27s
Test (macos-latest, nightly)	29s
Test (macos-latest, nightly, native-tls, dhall)	31s
Test (macos-latest, nightly, rustls)	1s
Test (windows-latest, stable)	1s
Test (windows-latest, stable, native-tls, dhall)	1s
Test (windows-latest, stable, rustls)	1s
Test (windows-latest, beta)	32s
Test (windows-latest, beta, native-tls, dhall)	35s
Test (windows-latest, beta, rustls)	37s
Test (windows-latest, nightly)	31s
Test (windows-latest, nightly, native-tls, dhall)	34s
Test (windows-latest, nightly, rustls)	33s
Create GitHub release	1s
	10m 32s

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