[ClamAV] Change mirror for Dockerfile

data/Dockerfiles/clamd/Dockerfile

@@ -23,7 +23,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   dos2unix \
   netcat \
   && rm -rf /var/lib/apt/lists/* \
-  && wget -O - https://www.clamav.net/downloads/production/clamav-${CLAMAV}.tar.gz | tar xfvz - \
+  && wget -O - https://fossies.org/linux/misc/clamav-${CLAMAV}.tar.gz | tar xfvz - \
   && cd clamav-${CLAMAV} \
   && ./configure \
   --prefix=/usr \