[skip ci] Fix wasm exception flag (#16683)

This PR fixes the wasm exceptions flag in emcc compile export.

python/tvm/contrib/emcc.py

@@ -42,7 +42,7 @@ def create_tvmjs_wasm(output, objects, options=None, cc="emcc"):
     cmd += ["-O3"]
     cmd += ["-std=c++17"]
     cmd += ["--no-entry"]
-    cmd += ["-fwasm-exception"]
+    cmd += ["-fwasm-exceptions"]
     cmd += ["-s", "WASM_BIGINT=1"]
     cmd += ["-s", "ERROR_ON_UNDEFINED_SYMBOLS=0"]
     cmd += ["-s", "STANDALONE_WASM=1"]