Fix typo

.melodium-ci/on_image.mel

@@ -92,7 +92,7 @@ treatment buildTestAyaForArch[logger: Logger, github_contexts: JavaScriptEngine,
     prepareSystem: localStep[logger=logger](
         name = |format("prepare_system_{short}", |entry("short", short_rust_arch)),
         commands = |raw_commands([
-            |format("mkdir /tmp/{short}, |entry("short", short_rust_arch)),
+            |format("mkdir /tmp/{short}", |entry("short", short_rust_arch)),
             ${bash -c "curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/taiki-e/setup-cross-toolchain-action/refs/tags/v1/main.sh | bash -"},
             |format("cat /tmp/{short}/github.env", |entry("short", short_rust_arch))
         ]),