ci (python) correct package name

Author: dweindl

scripts/buildAmici.sh

@@ -21,4 +21,4 @@ make python-sdist
 
 python3 -m venv ${AMICI_PATH}/build/venv --clear
 source ${AMICI_PATH}/build/venv/bin/activate
-pip3 install `ls -t ${AMICI_PATH}/build/python/amici-*.tgz | head -1`
+pip3 install `ls -t ${AMICI_PATH}/build/python/amici-*.tar.gz | head -1`