chore: add publishConfig.access=public to package.json

Was getting this error from npm on publish:

```
npm ERR! code E402
npm ERR! 402 Payment Required - PUT https://registry.npmjs.org/@readme%2fmicro - You must sign up for private packages

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/domh/.npm/_logs/2023-05-05T11_00_56_731Z-debug-0.log
```

It defaults to access=restricted for scoped packages

https://docs.npmjs.com/cli/v9/using-npm/config?v=true#access

package.json

@@ -39,5 +39,8 @@
     "nock": "^13.3.0",
     "prettier": "^2.8.7"
   },
-  "prettier": "@readme/eslint-config/prettier"
+  "prettier": "@readme/eslint-config/prettier",
+  "publishConfig": {
+    "access": "public"
+  }
 }