Switched base image to Ubuntu to align it with Swift image

Author: username0x0a

Dockerfile

@@ -14,7 +14,7 @@ RUN --mount=type=cache,target=/workspace/.build,id=build-$TARGETPLATFORM \
 	cp /workspace/.build/release/swiftformat /workspace
 
 # https://github.com/nicklockwood/SwiftFormat/issues/1930
-FROM busybox AS runner
+FROM ubuntu:24.04 AS runner
 COPY --from=builder /workspace/swiftformat /usr/bin/swiftformat
 ENTRYPOINT [ "/usr/bin/swiftformat" ]
 CMD ["."]