Update Hugo to version 0.60.0

Dockerfile

@@ -9,9 +9,9 @@
 # to work around segmentation fault issues.
 FROM golang:1.13-alpine
 ARG HUGO=hugo
-ARG HUGO_VERSION=0.59.1
-ARG HUGO_SHA=b92c47a705ad372887454644f8bee76caa6234be13c073834827b58f73fb7adb
-ARG HUGO_EXTENDED_SHA=851b3ac01b86969196b8ca40f0c58a6639f243bcb06541fcd27eff4117f7a3f7
+ARG HUGO_VERSION=0.60.0
+ARG HUGO_SHA=43d5a1af907461515ebdc0f86b877522bd33ae5dce36ef4a5cab2226f3ca8bed
+ARG HUGO_EXTENDED_SHA=a380d3c133f6d9b567550dc6958d30fe4a5f5eeb5390b3c8ae5f213b954419da
 RUN set -eux && \
     case ${HUGO} in \
       *_extended) \