Fix typo in ConnectionInformation class. (#4170)

## PR Type
What kind of change does this PR introduce?
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- Documentation content changes

Author: msftbot[bot]

Microsoft.Toolkit.Uwp.Connectivity/Network/ConnectionInformation.cs

@@ -135,9 +135,9 @@ public bool IsInternetOnMeteredConnection
         public byte? SignalStrength { get; private set; }
 
         /// <summary>
-        /// Gets signal strength for the current Internet Connection Profile.
+        /// Gets the network names associated with the current Internet Connection Profile.
         /// </summary>
-        /// <returns>value of <see cref="NetworkConnectivityLevel"/></returns>
+        /// <returns>value of <see cref="IReadOnlyList{String}"/></returns>
         public IReadOnlyList<string> NetworkNames
         {
             get
@@ -146,4 +146,4 @@ public IReadOnlyList<string> NetworkNames
             }
         }
     }
-}
+}