Refactor poem lines in readme.md

Updated poem formatting in readme.md for clarity.

Signed-off-by: Dan Knauss <273554+dknauss@users.noreply.github.com>

Author: dknauss

readme.md

@@ -11,9 +11,9 @@ _**This exploratory plugin is NOT production-ready**. Please [**help test it**](
 ![Unbreakable Barrier Gate](assets/fuwa-no-seki.png)
 
 So full of cracks,  
-the barrier gatehouse of Fuwa/
-lets both rain and moonlight in —/
-quietly exposed, yet enduring./
+the barrier gatehouse of Fuwa  
+lets both rain and moonlight in —  
+quietly exposed, yet enduring.  
 
 — [Abatsu-ni](https://en.wikipedia.org/wiki/Abutsu-ni), *Diary of the Waning Moon*