Readme tweak and package bump (#83)

* Readme tweak and package bump

* Create grumpy-suns-check.md

---------

Co-authored-by: Naresh <[email protected]>

Author: mikenomitch

.changeset/grumpy-suns-check.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/sandbox": patch
+---
+
+Bump containers package version

packages/sandbox/README.md

@@ -89,7 +89,7 @@ EXPOSE 3000
     {
       "class_name": "Sandbox",
       "image": "./Dockerfile",
-      "max_instances": 1
+      "max_instances": 20
     }
   ],
   "durable_objects": {

packages/sandbox/package.json

@@ -7,7 +7,7 @@
   },
   "description": "A sandboxed environment for running commands",
   "dependencies": {
-    "@cloudflare/containers": "^0.0.27"
+    "@cloudflare/containers": "^0.0.28"
   },
   "tags": [
     "sandbox",