test(examples): update setup

Ref: #62
Signed-off-by: Tomas Dvorak <[email protected]>

docs/cache.md

@@ -187,7 +187,7 @@ import { FileCache } from "bee-agent-framework/cache/fileCache";
 import * as os from "node:os";
 
 const cache = new FileCache({
-  fullPath: `${os.tmpdir()}/bee_file_cache.json`,
+  fullPath: `${os.tmpdir()}/bee_file_cache_${Date.now()}.json`,
 });
 console.log(`Saving cache to "${cache.source}"`);
 await cache.set("abc", { firstName: "John", lastName: "Doe" });