Updates a PDF embed link in a markdown file to correct a typo.
Also fixes encoding issues in PDF filenames. This ensures proper
linking and accessibility of the PDF documents.
Renames PDF files in the 'essentiels' directory to use underscores instead of spaces and special characters.
This improves compatibility across different operating systems and web servers.
Updates the corresponding links in the Essentiels.md file.
Updates the file path to ensure correct file access by addressing an encoding problem in the filename. This ensures proper linking and display of the referenced PDF document.
