CI: github actions: use cache for SSL libs

we have two kinds of SSL libs built - git based and version based.
this commit introduces caching for version based SSL libs.

(cherry picked from commit 27df87cc6318a96625568163280476b4077a6e61)
Signed-off-by: William Lallemand <wlallemand@haproxy.org>
(cherry picked from commit e7386d4364075315859a4638388c09715c22953a)
Signed-off-by: William Lallemand <wlallemand@haproxy.org>
1 file changed