Add examples 6 & 7 inputs & outputs + README entry. (Testing of examples 6 & 7 disabled until TOUGH executable can be made available in GitHub Actions - see NREL#318)

Author: softwareengineerprogrammer

README.rst

@@ -351,10 +351,14 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example5.txt <tests/examples/example5.txt>`__
      - `.out <tests/examples/example5.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example5>`__
-   * - Example 6: TOUGH2
-     - `example6.txt <https://github.com/NREL/GEOPHIRES-v2/blob/master/Examples/example6.txt>`__\*
-     -
-     -
+   * - Example 6: TOUGH2 (Multiple Gradients)
+     - `example6.txt <tests/examples/example6.txt>`__
+     - `.out <tests/examples/example6.out>`__
+     - \*
+   * - Example 7: TOUGH2 (Single Gradient)
+     - `example7.txt <https://github.com/NREL/GEOPHIRES-v2/blob/master/Examples/example7.txt>`__
+     - `.out <tests/examples/example7.out>`__
+     - \*
    * - Example 8: Cornell Direct-Use Heat
      - `example8.txt <tests/examples/example8.txt>`__
      - `.out <tests/examples/example8.out>`__
@@ -452,7 +456,7 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `.out <tests/examples/example_SBT_Lo_T.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SBT_Lo_T>`__
 
-*\*GEOPHIRES v2.0 input file*
+*\*TOUGH2 is not currently supported in the web interface. Comment on `this tracking issue <https://github.com/softwareengineerprogrammer/geothermal-ui/issues/15>`__ to request web interface support for TOUGH2.*
 
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