DOC: fix syntax error in examples index

Author: Gui-FernandesBR

docs/examples/index.rst

@@ -23,7 +23,7 @@ apogee of some rockets.
       "Prometheus (2022)": (4190.05, 3898.37),
       "Cavour (2023)": (2818.90, 2789),
       "Genesis (2023)": (3076.45, 2916),
-      "Camoes (2023)": (3003.28, 3015)",
+      "Camoes (2023)": (3003.28, 3015),
       "Juno III (2023)": (3026.05, 3213),
       "Halcyon (2023)": (3212.775, 3450),
    }