Revise README for V7 updates and breaking changes

Updated README to reflect new features in V7 and clarify migration to ESM.

README.md

@@ -12,9 +12,10 @@ 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.
+The V7 edition of the action includes:
+- Migrated action internals to ESM for compatibility with latest `@actions/*` packages. No changes to action inputs, outputs, or behavior.
 
 ## Breaking changes in V6
 

package.json

@@ -56,6 +56,6 @@
     "jest-each": "^30.4.1",
     "prettier": "^3.8.4",
     "ts-jest": "^29.4.11",
-    "typescript": "^7.0.2"
+    "typescript": "^6.0.3"
   }
 }