📝(readme) update xl packages info (#885)

Info message so people fulfill their licencing obligations

Signed-off-by: virgile-deville <virgile.deville@beta.gouv.fr>

Author: virgile-dev

README.md

@@ -24,8 +24,6 @@ Welcome to Docs! The open source document editor where your notes can become kno
 
 ## Why use Docs ❓
 
-⚠️ **Note that Docs provides docs/pdf exporters by loading [two BlockNote packages](https://github.com/suitenumerique/docs/blob/main/src/frontend/apps/impress/package.json#L22C7-L23C53), which we use under the AGPL-3.0 licence. Until we comply with the terms of this license, we recommend that you don't run Docs as a commercial product, unless you are willing to sponsor [BlockNote](https://github.com/TypeCellOS/BlockNote).**
-
 Docs is a collaborative text editor designed to address common challenges in knowledge building and sharing.
 
 ### Write
@@ -39,11 +37,13 @@ Docs is a collaborative text editor designed to address common challenges in kno
 *   🤝 Collaborate with your team in real time
 *   🔒 Granular access control to ensure your information is secure and only shared with the right people
 *   📑 Professional document exports in multiple formats (.odt, .doc, .pdf) with customizable templates
-*   📚 Built-in wiki functionality to turn your team's collaborative work into organized knowledge `ETA 02/2025`
+*   📚 Built-in wiki functionality to turn your team's collaborative work into organized knowledge `ETA 05/2025`
 
 ### Self-host
 *   🚀 Easy to install, scalable and secure alternative to Notion, Outline or Confluence
 
+⚠️ For the PDF and Docx export Docs relies on XL packages from BlockNote licenced in AGPL-3.0. Please make sure you fulfill your obligations regarding BlockNote licensing (see https://github.com/TypeCellOS/BlockNote/blob/main/packages/xl-pdf-exporter/LICENSE and https://www.blocknotejs.org/about#partner-with-us).
+
 ## Getting started 🔧
 
 ### Test it
@@ -118,6 +118,7 @@ $ make run-backend
 ```
 
 **Adding content**
+
 You can create a basic demo site by running:
 
 ```shellscript