omath: add version 3.9.4 (#8446)

packages/o/omath/xmake.lua

@@ -6,6 +6,7 @@ package("omath")
     add_urls("https://github.com/orange-cpp/omath/archive/refs/tags/$(version).tar.gz",
              "https://github.com/orange-cpp/omath.git", {submodules = false})
 
+    add_versions("v3.9.4", "7e4409ac40dc44f3c587067063bc66ecfa81ee9b1eeeb23a33f3952371b4eccf")
     add_versions("v3.9.3", "b2f3bf035aaa40cd527b5676af2ca8c581f78eca7a41ff0db6b93a237bab4aaf")
     add_versions("v3.9.0", "a87b77e00d3cbaad171a1682976359106fecdc20d99367f2b61719bc46b19776")
     add_versions("v3.8.2", "e759aba554f9d50147931852c13408ff0bd302a787ff28818d19d4dc1a8f7fd0")