Fix centos7 bindist name

x86_64-linux-centos7/Dockerfile

@@ -33,7 +33,7 @@ RUN sed -i -e 's/systemd//g' /etc/nsswitch.conf
 WORKDIR /tmp
 # Install GHC and cabal
 ENV GHC_VERSION 8.6.5
-RUN curl https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-x86_64-centos70-linux.tar.xz | tar -Jx
+RUN curl https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-x86_64-centos7-linux.tar.xz | tar -Jx
 WORKDIR /tmp/ghc-$GHC_VERSION
 RUN ./configure --prefix=/opt/ghc/$GHC_VERSION && make install