debian: bump libssl3 dep floor to 3.0.8 #158

Job	Run time
Resolve wolfSSL version matrix	2s
pre-PQC (v5.8.0-stable)	1m 6s
master (--enable-pqc)	2m 7s
master (no flag, opt-in check)	2m 2s
master (--enable-mlkem only)	1m 48s
master (--enable-mldsa only)	2m 40s
latest stable (v5.9.2-stable)	2m 1s
	11m 46s

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