release: dont use absolute path to hugo binary

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

Dockerfile

@@ -24,7 +24,7 @@ FROM build-base as build
 ARG HUGO_ENV
 ARG DOCS_URL
 COPY . .
-RUN /bin/hugo --gc --minify -d /out -e $HUGO_ENV -b $DOCS_URL
+RUN hugo --gc --minify -d /out -e $HUGO_ENV -b $DOCS_URL
 
 FROM scratch as release
 COPY --from=build /out /