Updated website documentation

Author: calvinp0

docs/source/advanced.rst

@@ -95,9 +95,23 @@ Another example::
 
 specifies ``DLPNO-CCSD(T)-F12/cc-pVTZ-F12`` model chemistry along with two auxiliary basis sets,
 ``aug-cc-pVTZ/C`` and ``cc-pVTZ-F12-CABS``, with ``TightOpt`` for a single point energy calculation.
+You can also provide a 4-digit ``year`` to distinguish method variants (e.g., ``b97d3`` vs ``b97d32023``)::
 
+    sp_level: {'method': 'b97d3',
+               'basis': 'def2tzvp',
+               'year': 2023}
 
-THe following are examples for **equivalent** definitions::
+Equivalent ``input.yml`` form::
+
+    sp_level:
+      method: b97d3
+      basis: def2tzvp
+      year: 2023
+
+If ``year`` is omitted, ARC will match the newest available entry for that method/basis in the Arkane database.
+
+
+The following are examples for **equivalent** definitions::
 
     opt_level = 'apfd/def2tzvp'
     opt_level = {'method': 'apfd', 'basis': 'def2tzvp'}