Fix: Deprecation warning soup findAll()

[joapuiib]

This PR replaces findAll to find_all to remove deprecation warning.

INFO    -  DeprecationWarning: Call to deprecated method findAll. (Replaced by find_all) -- Deprecated since version 4.0.0.
             File "/home/joapuiib/mkdocs/daw-ed/venv/lib64/python3.12/site-packages/encryptcontent/plugin.py", line 1095, in on_post_page
               something_search = soup.findAll(tag[0], {tag[1]: name})
             File "/home/joapuiib/mkdocs/daw-ed/venv/lib64/python3.12/site-packages/bs4/_deprecation.py", line 56, in alias
               warnings.warn(

Also deletes some blank spaces.