BUG: Fix RTD html extraction directory

Since the tarball already has "html", this results in html/html.

Author: thewtex

rtd-download.sh

@@ -6,10 +6,9 @@ DOC_VERSION=$(if [[ "${READTHEDOCS_GIT_IDENTIFIER}" == *v* ]]; then echo "${READ
 DOC_VERSION_NO_V=${DOC_VERSION//v/}
 curl -LO https://github.com/thewtex/ITKDoxygen/releases/download/${DOC_VERSION}/InsightDoxygenDocHtml-${DOC_VERSION_NO_V}.tar.zst
 
+mkdir -p $READTHEDOCS_OUTPUT
 unzstd --long=31 ./InsightDoxygenDocHtml-${DOC_VERSION_NO_V}.tar.zst
-mkdir -p $READTHEDOCS_OUTPUT/html
 tar xf \
   ./InsightDoxygenDocHtml-${DOC_VERSION_NO_V}.tar \
-  --strip-components=1 \
-  -C $READTHEDOCS_OUTPUT/html
+  -C $READTHEDOCS_OUTPUT