chore: fix typos in command-line output of Makefile recipe (#429)

Author: jenstroeger

Makefile

@@ -70,10 +70,10 @@ venv:
 	  echo "Found an inactive Python virtual environment, please activate or nuke it" && exit 1; \
 	fi
 	if [ -z "${PYTHON}" ]; then \
-	  echo "Creating virtual envirnoment in .venv/ for python3.10"; \
+	  echo "Creating virtual environment in .venv/ for python3.10"; \
 	  python3.10 -m venv --upgrade-deps --prompt . .venv; \
 	else \
-	  echo "Creating virtual envirnoment in .venv/ for ${PYTHON}"; \
+	  echo "Creating virtual environment in .venv/ for ${PYTHON}"; \
 	  ${PYTHON} -m venv --upgrade-deps --prompt . .venv; \
 	fi
 	touch .venv/pip.conf