Update Hugo to version 0.57.2

Dockerfile

@@ -9,9 +9,9 @@
 # to work around segmentation fault issues.
 FROM golang:1.12-alpine
 ARG HUGO=hugo
-ARG HUGO_VERSION=0.57.1
-ARG HUGO_SHA=4104915822ea0932f5658996c2a07d38e57b88ff82c45248cd5b2aa88aa3771f
-ARG HUGO_EXTENDED_SHA=32865effdd75f6c849baf4815d737b0a01c263998948b8c74815abdf1ebe8635
+ARG HUGO_VERSION=0.57.2
+ARG HUGO_SHA=558cd6d492562cf7bc2a24a683cdc2608043a4f593077442480944cc7c1f8665
+ARG HUGO_EXTENDED_SHA=f4ce91d6909d489fe5461633f6b6bd689ed14c9e06b1b7af110024420aa8fd91
 RUN set -eux && \
     case ${HUGO} in \
       *_extended) \