Improve description of Windows file associations

Author: jnthn

solutions/language/PATH-TO-RAKU.md

@@ -135,9 +135,9 @@ will continue to be supported for 6.e.  In 6.f, the `.pm`, `.pm6` and `.pod6`
 extensions should be marked as DEPRECATED, causing a message to be generated
 when the module is loaded.
 
-On Windows some more trickery may be involved to mark a script with the
-`.rk` extension as executable, because installers will need to add the
-`.rk` association as well.
+On Windows, installers should add a `.rk` association alongside the `.p6`
+association for the time being. Around the time of 6.f, a `.p6` association
+could be deselected by default, and perhaps dropped entirely by 6.g.
 
 ### Testing