Add missing sources from renewables

[dt-woods]

In the 2022 results inventory, there is no geothermal. This was identified in the second commit in KeyLogicLCA#14 (KeyLogicLCA@950f098); however, the cause of the error was traced back to the renewable module, geothermal.py, which doesn't have the new source string (as was done for hydro, nuclear, solar PV, solar thermal, and wind; see fix_renewable method in solar_upstream.py). Consider adding a source string for this inventory and see whether it fixes the missing inventory problem.

[dt-woods]

Looking at the latest GREET model, their 2024 U.S. mix has 0% geothermal, what little of it comes from California and Nevada. Maybe there just isn't enough to make the threshold for eLCI reporting.

[dt-woods]

This seems to go in hand with #247, as GEOTHERMAL is not excluded from the efficiency filter; see

ElectricityLCI/electricitylci/eia923_generation.py

Line 458 in 4ba67fb

fuel_categories_to_exclude=["NUCLEAR","WIND","SOLAR","SOLARTHERMAL",

If it is added to the exclusion list, GEOTHERMAL returns to the results (see orange bars where GEOTHERMAL is added to the exclusion list).