Fix path in UAA dev container (#4751)

There was a [change](cloudfoundry/uaa@766abb3) introduced with which renamed the directory name where the `uaa.yml` is located. This change fixes the path in the Dockerfile, so that the container can be properly built.

Author: chombium

.devcontainer/images/uaa/Dockerfile

@@ -9,7 +9,7 @@ RUN apt-get  update && apt-get install jq git curl -y \
 
 FROM mikefarah/yq:4 AS yq
 
-COPY --from=builder /uaa/scripts/cargo/uaa.yml /uaa.yml
+COPY --from=builder /uaa/scripts/boot/uaa.yml /uaa.yml
 
 # Change to root user
 USER root