L2SS-497: Fix typo in IERS stub filename

docker-compose/lofar-device-base/Dockerfile

@@ -9,7 +9,7 @@ RUN sudo pip3 install -r /lofar-requirements.txt
 # install and use ephimerides and geodetic ("measures") tables for casacore.
 # we install a _stub_ since the tables need to be deployed explicitly from within the software.
 RUN sudo mkdir -p /opt/IERS && sudo chmod a+rwx /opt/IERS
-ARG IERS_DIRNAME=IERS-1970-0101T00:00:00-stub
+ARG IERS_DIRNAME=IERS-1970-01-01T00:00:00-stub
 COPY WSRT_Measures_stub /opt/IERS/${IERS_DIRNAME}
 RUN ln -sfT /opt/IERS/${IERS_DIRNAME} /opt/IERS/current