Update conf.py

Author: mcbarton

docs/source/conf.py

@@ -16,6 +16,7 @@
                           __mamba_setup="$("$MAMBA_EXE" shell hook --shell bash --root-prefix "$MAMBA_ROOT_PREFIX" 2> /dev/null)";\
                           alias micromamba="$MAMBA_EXE";\
                           micromamba shell hook --shell bash > ~/.micromamba_hook.sh;\
+                          bash;\
                           . ~/.micromamba_hook.sh;\
                           micromamba create -f environment-wasm-build.yml -y;\
                           micromamba activate xeus-cpp-wasm-build;\