Update Hugo to version 0.83.1

Dockerfile

@@ -9,9 +9,9 @@
 # to work around segmentation fault issues.
 FROM golang:1.13-alpine
 ARG HUGO=hugo
-ARG HUGO_VERSION=0.83.0
-ARG HUGO_SHA=4250a77a3a0cfb3096c54200de6203b5db8b2ffde4aaf3cbb08edbcf01ba3c1b
-ARG HUGO_EXTENDED_SHA=84e2ef0a17f72261999d494b22ae24fa2cf9da4d6b2d524dba21b3ed0ed7004c
+ARG HUGO_VERSION=0.83.1
+ARG HUGO_SHA=5b756314756935e39040bba10867a7340e791e5e87890e0318760258c43e542e
+ARG HUGO_EXTENDED_SHA=7dab678e7bd47de76b311c1dc51257d1ba41d95e8e1d30869f701e1628261447
 RUN set -eux && \
     case ${HUGO} in \
       *_extended) \