[gtksourceview] Adwaita-dark.xml: tweak styling for grid color

[Christian Hergert <chergert src gnome org>]

commit 6a13a3348a8259f32f0bef0cdc9507fccaef7aac
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 11 23:05:00 2022 -0800

    Adwaita-dark.xml: tweak styling for grid color

 data/styles/Adwaita-dark.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/styles/Adwaita-dark.xml b/data/styles/Adwaita-dark.xml
index 41ed2cae..ccc82400 100644
--- a/data/styles/Adwaita-dark.xml
+++ b/data/styles/Adwaita-dark.xml
@@ -100,7 +100,7 @@
   <style name="current-line-number"         foreground="text6" background="highlight" bold="false"/>
   <style name="right-margin"                foreground="dark1" background="light4"/>
   <style name="draw-spaces"                 foreground="text0"/>
-  <style name="background-pattern"          background="#10101044"/>
+  <style name="background-pattern"          background="#aaaaaa08"/>
   <style name="misspelled-word"             underline="error" underline-color="red2"/>
 
   <style name="bracket-match"               background="light3" bold="true"/>