GHA: Run options_parse test for MinGW

Github: closes OpenVPN/openvpn#859
Change-Id: I7d9ffdc7d109b3fcbd91543506f16d23000fb136
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1257
Message-Id: <20251008131101.21498-1-gert@greenie.muc.de>
URL: https://sourceforge.net/p/openvpn/mailman/message/59243956/
Signed-off-by: Gert Doering <gert@greenie.muc.de>

Author: flichtenheld

.github/workflows/build.yaml

@@ -114,7 +114,7 @@ jobs:
       fail-fast: false
       matrix:
         arch: [x86, x64]
-        test: [argv, auth_token, buffer, cryptoapi, crypto, misc, ncp, packet_id, pkt, provider, ssl, tls_crypt, user_pass]
+        test: [argv, auth_token, buffer, cryptoapi, crypto, misc, options_parse, ncp, packet_id, pkt, provider, ssl, tls_crypt, user_pass]
 
     runs-on: windows-2025
     name: "mingw unittest ${{ matrix.test }} - ${{ matrix.arch }} - OSSL"