Infinite recursion with certain html

HTML in the attached file below causes infinite loop of some kind, uses all CPU and process hangs indefinitely.

[hubspot.txt](https://github.com/user-attachments/files/16380213/hubspot.txt)

- Version by `2024.2.26`
- Test script
```
def convert_to_text():
converter = html2text.HTML2Text()
# html from http://www.hubspot.com
with open("hubspot.txt", "r") as f:
text = f.read()
print("Running html2text...")
text = converter.handle(text)
# hangs here and uses all CPU.
print(text)

```
- Python version `3.11`