[gtksourceview] Adwaita-dark: increase contrast for line numbers

[Christian Hergert <chergert src gnome org>]

commit cb6289902897f3a1183aa9db168dc807b5d102fe
Author: Christian Hergert <chergert redhat com>
Date:   Sun Dec 26 15:04:45 2021 -0800

    Adwaita-dark: increase contrast for line numbers
    
    These are not very legible in some situations and we really need that for
    uses that have this as the default.

 data/styles/Adwaita-dark.xml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/data/styles/Adwaita-dark.xml b/data/styles/Adwaita-dark.xml
index 73f5b8b0..d9cd0935 100644
--- a/data/styles/Adwaita-dark.xml
+++ b/data/styles/Adwaita-dark.xml
@@ -78,9 +78,9 @@
   <style name="selection"                   foreground="#rgba(0,0,0,0)" background="#rgba(53, 132, 228, 
.3)"/>
   <style name="map-overlay"                 background="dark1"/>
   <style name="cursor"                      foreground="light4"/>
-  <style name="line-numbers"                foreground="content_alt" background="content_bg"/>
-  <style name="current-line"                background="#222"/>
-  <style name="current-line-number"         foreground="dark1" background="#222" bold="true"/>
+  <style name="line-numbers"                foreground="dark2" background="content_bg"/>
+  <style name="current-line"                background="#202020"/>
+  <style name="current-line-number"         foreground="dark1" background="#202020" bold="true"/>
   <style name="right-margin"                foreground="content_bg_alt" background="content_bg_alt"/>
   <style name="draw-spaces"                 foreground="dark1"/>
   <style name="background-pattern"          background="dark4"/>