Update @actions/cache to 5.1.0 and add security overrides for undici and fast-xml-parser (#1579)

* Update @actions/cache to 5.1.0, add security overrides for undici and fast-xml-parser, update licenses

* Fix debug message for unchanged cache validation in tests

* Fix formatting in cache validation test for unchanged cache

* Bump version to 6.5.0

.licenses/npm/@actions/cache.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/cache"
-version: 5.0.5
+version: 5.1.0
 type: npm
 summary: Actions cache lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/cache