chore: release v7.0.0 for Node.js 24 support

- Update to Node.js 24 runtime (runs.using: node24)
- Bump version to 7.0.0
- Update README with v7 release notes
- Rebuild dist

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "download-artifact",
-  "version": "6.0.0",
+  "version": "7.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "download-artifact",
-      "version": "6.0.0",
+      "version": "7.0.0",
       "license": "MIT",
       "dependencies": {
         "@actions/artifact": "^5.0.0",