Synthe added

mkdocs.yml

@@ -80,6 +80,9 @@ nav:
     - Common VHDL mistakes: vhdl/vhdl-mistakes.md
     - SIT 212: vhdl/sit212.md
     - FPGA Board Documentation: vhdl/board-docs.md
+  - UE Electrical Engineering: 
+    - Digital synthesizer: vhdl/synthe.md
+    - Audio filter Lab: vhdl/filter.md
   - UE MEDCON:
     - Presentation: vhdl/medcon.md
     - Loto Lab: vhdl/loto.md