Update .env

Author: soulteary

docker/master/.env

@@ -1,5 +1,5 @@
-NGINX_VERSION=1.21.0
+NGINX_VERSION=1.21.1
 MODULE_CHECKSUM=067aab5e26e835e862c438a475dee2e4ff677d2a
 MODULE_VERSION=master
 MODULE_NAME=nginx-push-stream-module-src
-MODULE_SOURCE=https://github.com/nginx-with-docker/nginx-push-stream-module-src
+MODULE_SOURCE=https://github.com/nginx-with-docker/nginx-push-stream-module-src