Update build script for multiple possible Hugo installs

build.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 git pull;
-/home/linuxbrew/.linuxbrew/bin/hugo && find public -path "*.html" -type f -exec tidy --quiet yes --drop-empty-elements no --hide-comments yes -o {} {} \;
+`which hugo` && find public -path "*.html" -type f -exec tidy --quiet yes --drop-empty-elements no --hide-comments yes -o {} {} \;