stop testing with libressl 3.9 (#12836)

its no longer used by any supported version of openbsd

Author: alex

.github/workflows/ci.yml

@@ -41,7 +41,6 @@ jobs:
           - {VERSION: "3.12", NOXSESSION: "tests", NOXARGS: "--enable-fips=1", OPENSSL: {TYPE: "openssl", CONFIG_FLAGS: "enable-fips", VERSION: "3.5.0"}}
           - {VERSION: "3.12", NOXSESSION: "tests", OPENSSL: {TYPE: "openssl", VERSION: "3.4.1"}}
           - {VERSION: "3.12", NOXSESSION: "tests", OPENSSL: {TYPE: "openssl", VERSION: "3.5.0"}}
-          - {VERSION: "3.12", NOXSESSION: "rust,tests", OPENSSL: {TYPE: "libressl", VERSION: "3.9.2"}}
           - {VERSION: "3.12", NOXSESSION: "rust,tests", OPENSSL: {TYPE: "libressl", VERSION: "4.0.0"}}
           - {VERSION: "3.12", NOXSESSION: "tests-randomorder"}
           # Latest commit on the BoringSSL main branch, as of May 02, 2025.