docs: add V7 ESM migration and NODE_AUTH_TOKEN behavior change (#1593)

Co-authored-by: gowridurgad <gowridurgad@gmail.com>

README.md

@@ -12,9 +12,13 @@ This action provides the following functionality for GitHub Actions users:
 - Registering problem matchers for error output
 - Configuring authentication for GPR or npm
 
-## Breaking changes in V7
+## What's new in V7
 
-- **Migrated to ESM** to enable support for the latest `@actions/*` package versions.
+- Migrated action internals to ESM for compatibility with latest `@actions/*` packages. No changes to action inputs, outputs, or behavior.
+
+### Breaking change
+
+- The dummy `NODE_AUTH_TOKEN` fallback has been removed, as it could unintentionally affect the generated `.npmrc` with a non-functional token. With this change, if `registry-url` is set without `NODE_AUTH_TOKEN`, legacy Yarn Classic (1.x) and older Node/npm versions may fail, and pnpm may warn. npm Trusted Publishing (OIDC) is not affected, since it does not use `NODE_AUTH_TOKEN`.
 
 ## Breaking changes in V6
 
@@ -30,7 +34,7 @@ This action provides the following functionality for GitHub Actions users:
 - Upgraded action from node20 to node24.
   > Make sure your runner is on version v2.327.1 or later to ensure compatibility with this release. [See Release Notes](https://github.com/actions/runner/releases/tag/v2.327.1)
 
-For more details, see the full release notes on the [releases page](https://github.com/actions/setup-node/releases/v5.0.0)
+For more details, see the full release notes on the [releases page](https://github.com/actions/setup-node/releases)
 
 ## Usage
 

package-lock.json

@@ -26,7 +26,7 @@
         "@types/semver": "^7.7.0",
         "@typescript-eslint/eslint-plugin": "^8.62.0",
         "@typescript-eslint/parser": "^8.62.0",
-        "@vercel/ncc": "^0.44.1",
+        "@vercel/ncc": "^0.44.0",
         "eslint": "^10.5.0",
         "eslint-config-prettier": "^10.1.8",
         "eslint-plugin-jest": "^29.15.2",
@@ -2639,9 +2639,9 @@
       ]
     },
     "node_modules/@vercel/ncc": {
-      "version": "0.44.1",
-      "resolved": "https://registry.npmjs.org/@vercel/ncc/-/ncc-0.44.1.tgz",
-      "integrity": "sha512-cUjIE5P2YY1n+Kt9rFIazMMpGoPn1Fic04rOmTkElMkiDP5oszGfERMpo2shVkFKDL7rVppdM2pqJKC59shQWQ==",
+      "version": "0.44.0",
+      "resolved": "https://registry.npmjs.org/@vercel/ncc/-/ncc-0.44.0.tgz",
+      "integrity": "sha512-pHyI+bZokSgIscTKFSmpNk5vZzmOrb9RW0Vu4SRyqUvkJ0kgg3PzaZLLDVTFXhbUiCqg0/Eu8L4fKtgViA92kg==",
       "dev": true,
       "license": "MIT",
       "bin": {

package.json

@@ -46,7 +46,7 @@
     "@types/semver": "^7.7.0",
     "@typescript-eslint/eslint-plugin": "^8.62.0",
     "@typescript-eslint/parser": "^8.62.0",
-    "@vercel/ncc": "^0.44.1",
+    "@vercel/ncc": "^0.44.0",
     "eslint": "^10.5.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-jest": "^29.15.2",