[#68] Fix incorrect archive-mapping example in BuildReport comment

The FileListArchiveHelper example mapped a ContentFile to its role
(ContentFile) instead of to the containing archive filename. It maps the
internal file name to the archive file name, matching the AssetBundle
example above it.

Author: SkowronskiAndrew

Analyzer/SerializedObjects/BuildReport.cs

@@ -198,7 +198,7 @@ public FileListArchiveHelper(List<BuildFile> files)
     ...
 
     Result:
-    1b5ddb63f662928d24e43d5d9b8b9597.cf -> ContentFile
+    1b5ddb63f662928d24e43d5d9b8b9597.cf -> content0.archive
     */
     /// </summary>
     private void CalculateArchiveMapping(List<BuildFile> files)