[gnome-calculator/wip/exalm/active] style: Stop using :hover:active

[Alexander Mikhaylenko <alexm src gnome org>]

commit 76ef3f922f3797359f33dde90fce5565e087aad5
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue May 24 05:25:44 2022 +0400

    style: Stop using :hover:active
    
    See https://gitlab.gnome.org/GNOME/libadwaita/-/merge_requests/548

 src/ui/style.css | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/ui/style.css b/src/ui/style.css
index a3b385ee..dde8ad82 100644
--- a/src/ui/style.css
+++ b/src/ui/style.css
@@ -123,7 +123,7 @@ clamp > .small .bit-panel button {
   background-color: alpha(currentColor, .25);
 }
 
-.math-buttons .number-button:hover:active,
+.math-buttons .number-button:active,
 .math-buttons .number-button.keyboard-activating {
   background-color: alpha(currentColor, .35);
 }