Use CI_CONDA_DIR in publish workflow script

.github/scripts/publish.sh

@@ -5,6 +5,6 @@ ci_conda_activate
 set -ux
 f=recipe/meta.json
 glob="$(jq -r .name $f)-$(jq -r .version $f)-*_$(jq -r .buildnum $f).tar.bz2"
-for x in $(find conda/conda-bld -type f -name "$glob"); do
+for x in $(find $CI_CONDA_DIR/conda-bld -type f -name "$glob"); do
   anaconda -t $ANACONDA_TOKEN upload $x
 done