fix intersphinx mapping identifiers (must be lowercase and not start …

…with 'py') (sphinx-doc/sphinx#9682)

conf.py

@@ -176,10 +176,10 @@ def _LatestTagName():
 # Sphinx.Ext.InterSphinx
 # ==============================================================================
 intersphinx_mapping = {
-	'python':               ('https://docs.python.org/3', None),
-	'osvb':                 ('https://umarcor.github.io/osvb', None),
-	'pyVHDLModel':          ('https://vhdl.github.io/pyVHDLModel', None),
-	'pySystemVerilogModel': ('https://edaa-org.github.io/pySystemVerilogModel', None),
+	'python':    ('https://docs.python.org/3', None),
+	'osvb':      ('https://umarcor.github.io/osvb', None),
+	'vhdlmodel': ('https://vhdl.github.io/pyVHDLModel', None),
+	'svmodel':   ('https://edaa-org.github.io/pySystemVerilogModel', None),
 }