Wait on ssh process so it doesn't become a zombie #7

Job	Run time
Validate documentation	16s
Build: Linux (Xenial, Clang, mbedTLS, libssh2)	28s
Build: macOS	1d 0h 0m 0s
Build: Sanitizer (Thread)	34s
Build: Sanitizer (UndefinedBehavior)	32s
Build: Windows (amd64, Visual Studio, Schannel)	1m 50s
Build: Sanitizer (Address)	34s
Build: Linux (Noble, GCC, OpenSSL, libssh2)	35s
Build: Linux (Xenial, GCC, OpenSSL, OpenSSH)	26s
Build: Sanitizer (Memory)	34s
Build: Windows (x86, mingw, Schannel)	55s
Build: Linux (Noble, Clang, mbedTLS, OpenSSH)	36s
Build: Windows (amd64, mingw, WinHTTP)	1m 0s
Build: Windows (x86, Visual Studio, WinHTTP)	1m 48s
Test results	8s
	1d 0h 10m 16s

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