Backends: GLFW: improve multi-viewport behavior in tiling WMs (X11). Amend changelog solely for linking to #2117.

docs/CHANGELOG.txt

@@ -98,7 +98,7 @@ Docking+Viewports Branch:
 
 - Backends: GLFW: improve multi-viewport behavior in tiling WMs on X11.
   Note: using GLFW backend on Linux/BSD etc. requires linking with `-lX11`.
-  (#8884, #8474, #8289) [@Ikos3k, @Madman10K]
+  (#8884, #8474, #8289, #2117) [@Ikos3k, @Madman10K]
 
 
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