Update app.py

app.py

@@ -35,7 +35,7 @@ For more information on the transformation policies, please refer to the guide [
 header_string = """
 ## [PIISA](https://privacyprotection.substack.com/p/towards-a-common-privacy-api-introducing)
 **PIISA** (Personally Identifiable Information Standard Architecture) is a set of tools to detect and remediate 
-PII within large scale language data. It uses best of breed  tools like :hugs: [transformers](https://huggingface.co/docs/transformers/index) libraries, 
+PII within large scale language data. It uses best of breed  tools like [🤗 transformers](https://huggingface.co/docs/transformers/index) libraries, 
 [spaCy](https://spacy.io/), regular expressions, [Faker](https://faker.readthedocs.io/en/master/) and [Presidio](https://microsoft.github.io/presidio/)
 to leverage best practices for effectively managing data privacy in accordance with your privacy policies.