refactor(icons): enable further usage

packages/foundations/assets/icons/README.md

@@ -7,10 +7,10 @@ We're getting these icons by the [DB Design System colleagues](https://dbsw.shar
 -   Minifications with [`ImageOptim`](https://imageoptim.com/mac)
 -   Adding some contents within the SVGs (these assets might get exported correctly in the future)
     -   CSS variables
-        -   replace `fill="#282D37"` by `fill="var(--db-icon-color, currentColor)"`
-        -   replace `fill="#55b9e6"` by `fill="var(--db-icon-color, #55b9e6)"`
-        -   replace `fill="#EC0016"` by `fill="var(--db-icon-pulse-color, #EC0016)"`
-        -   replace `fill="#78be14"` by `fill="var(--db-icon-pulse-color, #78be14)"`
+        -   replace `fill="#282D37"` by `fill="#282D37" style="var(--db-icon-color, currentColor)"`
+        -   replace `fill="#55b9e6"` by `fill="#55b9e6" style="var(--db-icon-color, #55b9e6)"`
+        -   replace `fill="#EC0016"` by `fill="#EC0016" style="var(--db-icon-pulse-color, #EC0016)"`
+        -   replace `fill="#78be14"` by `fill="#78be14" style="var(--db-icon-pulse-color, #78be14)"`
     -   `id`-Attribute (generic `icon` id within all SVG files)
 
 ## Icon font generation