Merge pull request #408 from prestist/update-dockerfile-to-be-uniform

Dockerfile: update second 'from' to be consistant in using f37

Dockerfile

@@ -5,6 +5,6 @@ COPY . /butane
 WORKDIR /butane
 RUN ./build_for_container
 
-FROM registry.fedoraproject.org/fedora-minimal:36
+FROM registry.fedoraproject.org/fedora-minimal:37
 COPY --from=builder /butane/bin/container/butane /usr/local/bin/butane
 ENTRYPOINT ["/usr/local/bin/butane"]