Update conf.py

Author: mcbarton

docs/source/conf.py

@@ -18,7 +18,7 @@
 eval "$__mamba_setup";
 alias micromamba="$MAMBA_EXE";
 micromamba create -f environment-wasm-build.yml -y;
-micromamba create -f environment-wasm-build;
+micromamba activate environment-wasm-build;
 micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32;
 mkdir -p build;
 cd build;