[ci] Disabled sounds tests under firefox

See emscripten-core#23701, emscripten-core#24205

Author: sbc100

.circleci/config.yml

@@ -390,6 +390,8 @@ commands:
             # TODO: Do GL testing when https://bugzil.la/1375585 (lack of WebGL
             #       support in headless mode) resolves
             EMTEST_LACKS_GRAPHICS_HARDWARE: "1"
+            # TODO(https://github.com/emscripten-core/emscripten/issues/24205)
+            EMTEST_LACKS_SOUND_HARDWARE: "1"
             EMTEST_LACKS_WEBGPU: "1"
             # OffscreenCanvas support is not yet done in Firefox.
             EMTEST_LACKS_OFFSCREEN_CANVAS: "1"