Update @actions/cache and remove overrides

Now that `@actions/cache` has been updated, we can remove our manual
overrides for vulnerable dependencies.

node_modules/@actions/http-client/lib/index.d.ts

@@ -51,6 +51,7 @@ export declare class HttpClientResponse {
     constructor(message: http.IncomingMessage);
     message: http.IncomingMessage;
     readBody(): Promise<string>;
+    readBodyBuffer?(): Promise<Buffer>;
 }
 export declare function isHttps(requestUrl: string): boolean;
 export declare class HttpClient {