Add comedy to the changelog

changelog.txt

@@ -6,7 +6,7 @@ Date: 2024-1-??
     - Fixed that water would create pollution tiles in the tailings pond
     - Increased the tile/pollution tile ratio from 300/1 -> 500/1
     - Forced tailings ponds to overfill only when they have exactly 100% fill level instead of >99%
-    - Fixed that tailings did not create pollution tiles in the tailings pond
+    - Fixed that tailings did not create tailings tiles in the tailings pond
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 Version: 2.1.14
 Date: 2024-1-19