Resolve intersphinx to self for DOLFINx.

Author: jhale

python/doc/source/conf.py

@@ -160,8 +160,9 @@
 
 codeautolink_concat_default = True
 
+intersphinx_resolve_self = 'dolfinx'
+
 # Could be reimplemented using packaging.version
-dolfinx_version = "main" if "dev0" in dolfinx.__version__ else "v" + dolfinx.__version__
 basix_version = "main" if "dev0" in basix.__version__ else "v" + basix.__version__
 ffcx_version = "main" if "dev0" in ffcx.__version__ else "v" + ffcx.__version__
 ufl_version = "main" if "dev0" in ufl.__version__ else ufl.__version__