Make addRaylib use options.opengl_version (#4049)

src/build.zig

@@ -22,6 +22,7 @@ pub fn addRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
         .platform_drm = options.platform_drm,
         .shared = options.shared,
         .linux_display_backend = options.linux_display_backend,
+        .opengl_version = options.opengl_version,
     });
     const raylib = raylib_dep.artifact("raylib");