docs: Re-enable yoscrypt lexer

We are already using `furo-ys` for `SBYLexer`, we just needed `YoscryptLexer` as well.

docs/source/conf.py

@@ -24,3 +24,6 @@ extensions += ['sphinxarg.ext']
 def setup(app: Sphinx) -> None:
     from furo_ys.lexers.SBYLexer import SBYLexer
     app.add_lexer("sby", SBYLexer)
+
+    from furo_ys.lexers.YoscryptLexer import YoscryptLexer
+    app.add_lexer("yoscrypt", YoscryptLexer)

docs/source/verific.rst

@@ -151,6 +151,7 @@ by a SystemVerilog file ``formal_bind.sv``.
 .. _vhd_example: https://github.com/YosysHQ/sby/tree/master/docs/examples/vhd
 
 .. literalinclude:: ../examples/vhd/formal_bind.sby
+  :language: yoscrypt
   :start-after: [script]
   :end-before: [files]
   :caption: ``formal_bind.sby`` script section