Update Dockerfile

Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get update && apt-get install -y curl
 
 RUN version=$(basename $(curl -sL -o /dev/null -w %{url_effective} https://github.com/gngpp/ninja/releases/latest)) \
     && base_url="https://github.com/gngpp/ninja/releases/expanded_assets/$version" \
-    && latest_url=https://github.com/$(curl -sL $base_url | grep -oP 'href="ninja-0.9.16-x86_64-unknown-linux-musl.tar.gz")' | sed 's/href="//') \
+    && latest_url=https://github.com/$(curl -sL $base_url | grep -oP 'href="ninja-0.9.16-i686-unknown-linux-gnu.tar.gz")' | sed 's/href="//') \
     && curl -Lo ninja.tar.gz $latest_url \
     && tar -xzf ninja.tar.gz