Upgrade to Node 24 (#276)

* upgrade to node24

* update .node-version to 24.x

Signed-off-by: Brian DeHamer <bdehamer@github.com>

* delete publish immutable action

Signed-off-by: Brian DeHamer <bdehamer@github.com>

* bump version from 2.4.0 to 3.0.0

Signed-off-by: Brian DeHamer <bdehamer@github.com>

---------

Signed-off-by: Brian DeHamer <bdehamer@github.com>
Co-authored-by: Salman Chishti <salmanmkc@GitHub.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "actions/attest",
   "description": "Generate signed attestations for workflow artifacts",
-  "version": "2.4.0",
+  "version": "3.0.0",
   "author": "",
   "private": true,
   "homepage": "https://github.com/actions/attest",
@@ -20,7 +20,7 @@
     ".": "./dist/index.js"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=24"
   },
   "scripts": {
     "bundle": "npm run format:write && npm run package",