Add alt text in the content property

features/alt-text-generated-content.yml

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+name: Alt text for generated content
+description: "The `/` notation in `content` CSS property values adds alternative text to generated content. For example, the `content: url('upvote-icon.svg') / 'Upvote'` declaration adds accessible 'Upvote' text to the SVG icon. Also known as alternate text."
+spec: https://drafts.csswg.org/css-content-3/#alt
+group: css
+compat_features:
+  - css.properties.content.alt_text

features/alt-text-generated-content.yml.dist

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+# Generated from: alt-text-generated-content.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: low
+  baseline_low_date: 2024-07-09
+  support:
+    chrome: "77"
+    chrome_android: "77"
+    edge: "79"
+    firefox: "128"
+    firefox_android: "128"
+    safari: "17.4"
+    safari_ios: "17.4"
+compat_features:
+  - css.properties.content.alt_text