update README

README.md

@@ -21,7 +21,7 @@ Store GitHub Packages Username
 
 Setup GitHub Personal Access Token (PAT)
 
-* Follow this [GitHub guide](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens#creating-a-personal-access-token-classic) to generate a PAT
+* Follow this [GitHub guide](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens#creating-a-personal-access-token-classic) to generate a PAT with `read:packages` permission
 * Store the new token as an environment variable: 
 `export GITHUB_PACKAGES_TOKEN={YOUR_GITHUB_TOKEN}`