Fix dependency on my sqlcipher4 package

README.md

@@ -82,6 +82,17 @@ Make sure you have `libxcb-cursor0` installed (on Debian-based distributions) or
 
 If downloading from my Forgejo's Releases page, you may wish to verify the GPG signatures with my [GPG key](https://mig5.net/static/mig5.asc).
 
+### Debian 13 ('Trixie')
+
+```bash
+sudo mkdir -p /usr/share/keyrings
+curl -fsSL https://mig5.net/static/mig5.asc | sudo gpg --dearmor -o /usr/share/keyrings/mig5.gpg
+echo "deb [arch=amd64 signed-by=/usr/share/keyrings/mig5.gpg] https://apt.mig5.net $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/mig5.list
+sudo apt update
+sudo apt install bouquin
+```
+
+
 ### From PyPi/pip
 
  * `pip install bouquin`