Set IncludeContributors to false by default

Author: Jericho

src/GitReleaseManager.Core/Configuration/Config.cs

@@ -27,7 +27,7 @@ public Config()
                 ShaSectionHeading = "SHA256 Hashes of the release artifacts",
                 ShaSectionLineFormat = "- `{1}\t{0}`",
                 AllowUpdateToPublishedRelease = false,
-                IncludeContributors = true,
+                IncludeContributors = false,
             };
 
             Export = new ExportConfig