Make explicit 4.1 is being maintained by a special situation

[ci skip]

guides/source/maintenance_policy.md

@@ -39,7 +39,10 @@ Only the latest release series will receive bug fixes. When enough bugs are
 fixed and its deemed worthy to release a new gem, this is the branch it happens
 from.
 
-**Currently included series:** `4.2.Z`, `4.1.Z`.
+In special situations, where someone from the Core Team agrees to support more series,
+they are included in the list of supported series.
+
+**Currently included series:** `4.2.Z`, `4.1.Z` (Supported by Rafael França).
 
 Security Issues
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