Update Hugo to version 0.79.0

Dockerfile

@@ -9,9 +9,9 @@
 # to work around segmentation fault issues.
 FROM golang:1.13-alpine
 ARG HUGO=hugo
-ARG HUGO_VERSION=0.78.2
-ARG HUGO_SHA=6c139580bf42dd66615f61cb33d62fc47cb855790d744050d78924bf1f48df0d
-ARG HUGO_EXTENDED_SHA=26410c5ddf2124d6d99b3d0ee00dcae1e16c1a3ccb9feae025d76c0f3c04745e
+ARG HUGO_VERSION=0.79.0
+ARG HUGO_SHA=1e5a2909e2c121823113f4c2fd2f4818b77319dc12991221d90f4fa66db04f9c
+ARG HUGO_EXTENDED_SHA=d5b780f83bdbd444ce40d36127d9a7000dcb86146f453989b68c3c81e4d40682
 RUN set -eux && \
     case ${HUGO} in \
       *_extended) \