dockerfile: oops, confused im6convert with fileformat

Dockerfile

@@ -5,13 +5,13 @@ ARG BUILD_DATE
 LABEL \
     maintainer="https://ocr-d.de/kontakt" \
     org.label-schema.vcs-ref=$VCS_REF \
-    org.label-schema.vcs-url="https://github.com/OCR-D/ocrd_fileformat" \
+    org.label-schema.vcs-url="https://github.com/OCR-D/ocrd_im6convert" \
     org.label-schema.build-date=$BUILD_DATE
 ENV DEBIAN_FRONTEND noninteractive
 
 ENV PREFIX=/usr/local
 
-WORKDIR /build/ocrd_fileformat
+WORKDIR /build/ocrd_im6convert
 COPY ocrd-im6convert .
 COPY ocrd-tool.json .
 COPY Makefile .
@@ -22,8 +22,8 @@ RUN apt-get update && \
     ca-certificates \
     make && \
     make deps-ubuntu install && \
-    rm -fr /build/ocrd_fileformat
+    rm -fr /build/ocrd_im6convert
 # smoke test
-RUN ocrd-fileformat-transform --version
+RUN ocrd-im6convert --version
 
 ENV DEBIAN_FRONTEND teletype