C#: Address review comments.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.CSharp.Standalone/Runtime.cs

@@ -92,7 +92,7 @@ private static Dictionary<string, RuntimeVersion> ParseRuntimes(IList<string> li
                 var match = RuntimeRegex().Match(r);
                 if (match.Success)
                 {
-                    runtimes.AddOrUpdate(match.Groups[1].Value, new RuntimeVersion(match.Groups[6].Value, match.Groups[2].Value, match.Groups[4].Value, match.Groups[5].Value));
+                    runtimes.AddOrUpdateToLatest(match.Groups[1].Value, new RuntimeVersion(match.Groups[6].Value, match.Groups[2].Value, match.Groups[4].Value, match.Groups[5].Value));
                 }
             });
 

csharp/extractor/Semmle.Util/DictionaryExtensions.cs

@@ -22,9 +22,9 @@ public static void AddAnother<T1, T2>(this Dictionary<T1, List<T2>> dict, T1 key
 
         /// <summary>
         /// Adds a new value or replaces the existing value (if the new value is greater than the existing) 
-        /// in dictionary for the given key.
+        /// in this dictionary for the given key.
         /// </summary>
-        public static void AddOrUpdate<T1, T2>(this Dictionary<T1, T2> dict, T1 key, T2 value) where T1 : notnull where T2 : IComparable<T2>
+        public static void AddOrUpdateToLatest<T1, T2>(this Dictionary<T1, T2> dict, T1 key, T2 value) where T1 : notnull where T2 : IComparable<T2>
         {
             if (!dict.TryGetValue(key, out var existing) || existing.CompareTo(value) < 0)
             {