Add documentation link to .txt

Author: softwareengineerprogrammer

tests/examples/Fervo_Project_Red-2026.txt

@@ -2,6 +2,7 @@
 # Based on GEOPHIRES example Fervo_Norbeck_Latimer_2023 (https://gtp.scientificwebservices.com/geophires?geophires-example-id=Fervo_Norbeck_Latimer_2023)
 # with 2026 updates derived from https://fervoenergy.com/enhanced-geothermal-has-been-proven-at-scale-heres-what-two-years-of-production-data-show/
 # Paper references are to "Commercial-Scale Demonstration of a First-of-a-Kind Enhanced Geothermal System." (Norbeck & Latimer, 2023) (https://doi.org/10.31223/X52X0B).
+# See documentation: https://softwareengineerprogrammer.github.io/GEOPHIRES/Fervo_Project_Red.html
 
 Reservoir Model, 1
 Reservoir Volume Option, 1