Fix Day2 Part 2 test name

test/Day2Spec.hs

         playGames games `shouldBe` Score 15
       it "can play game plan" $ do
          day2_1 input `shouldBe` Score 15
-    describe "Day2 - Part1" $ do
+    describe "Day2 - Part2" $ do
       it "can parse game plan as hints" $ do
          readGameHints input `shouldBe` gameHints
       it "can convert game plan" $ do