[wasm] Bump swift-compiler-version 5.7.3

Author: kateinoigakukun

utils/webassembly/build-presets.ini

@@ -26,7 +26,7 @@ install-prefix=/usr
 
 mixin-preset=webassembly
 sccache
-swift-compiler-version=5.7.1
+swift-compiler-version=5.7.3
 extra-cmake-options=
     -DSWIFT_BUILD_SOURCEKIT=FALSE
     -DSWIFT_ENABLE_SOURCEKIT_TESTS=FALSE