[librsvg: 1/5] List the isolation property in FEATURES.md

[Marge Bot <marge-bot src gnome org>]

commit 01e1a5fd0a0ac1429d3c4e0bebd42a737ecfa5f8
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Nov 12 18:36:50 2021 -0600

    List the isolation property in FEATURES.md
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/633>

 FEATURES.md | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/FEATURES.md b/FEATURES.md
index dd4cec894..a35139ee9 100644
--- a/FEATURES.md
+++ b/FEATURES.md
@@ -312,6 +312,7 @@ which properties are not available as presentation attributes.
 | font-style                  |                                                        |
 | font-variant                |                                                        |
 | font-weight                 |                                                        |
+| isolation                   | Not available as a presentation attribute.             |
 | letter-spacing              |                                                        |
 | lighting-color              |                                                        |
 | line-height                 | Not available as a presentation attribute.             |