Fix arm docker build gfortran NOCHANGELOG

failed pipeline : https://dev.funkwhale.audio/funkwhale/funkwhale/-/jobs/242672 scipy was introduced in !2854 (merged)

testing with /funkwhale/api$ docker buildx build --platform linux/arm/v7 .

get the package being built : ps aux | grep pip | grep 'build' | awk '{print $NF}'

package taking a lot of time :

• scipy
• scikit-learn
• ninja (looks like a scipy dep, why is it building since i try to use prebuild scipy package ? )
• uvloop