test: shellcheck fix

Author: lrm25

tests/rest_scripts/init_python_env.sh

@@ -37,7 +37,7 @@ if ! python3 -m pip list | grep awscrt 1>/dev/null; then
     exit 1
   fi
 fi
-if [ $deactivate == "true" ] && ! deactivate; then
+if [ "$deactivate" == "true" ] && ! deactivate; then
   log_rest 2 "error deactivating"
   exit 1
 fi