Update fluff.json

I found and repair some typo in Terraforming... and variants.

data/json/items/fluff.json

@@ -904,7 +904,7 @@
     "use_action": [ "PLAY_GAME" ],
     "variants": [
       {
-        "id": "terraforming_mars",
+        "id": "terraforming_mercury",
         "name": { "str": "Terraforming - Mercury", "str_pl": "sets of Terraforming - Mercury" },
         "description": "This board game is set in the 4300s, where corporations are working together to terraform the planet Mercury, the smallest and innermost planet in our solar system.  Each player (or just the player) will have unique abilities and resources at their disposal, and they will need to strategize and cooperate with one another to achieve their goals."
       },
@@ -945,7 +945,7 @@
       },
       {
         "id": "terraforming_earth",
-        "name": { "str": "Terraforming - Pluto", "str_pl": "sets of Terraforming - Pluto" },
+        "name": { "str": "Terraforming - Earth", "str_pl": "sets of Terraforming - Earth" },
         "description": "This board game is set in the 5000s, a distant future where Earth has become uninhabitable due to climate change, resource depletion, and overpopulation.  The player or players must work together to restore the planet's ecosystems, atmosphere, and climate while also competing for resources and prestige."
       }
     ]