New Reade accent icon (#22562)

switches out the Reade accent icon for a new one.
instead of random purple splotches, we have the light blue gas giant

<img width="32" height="10" alt="reade"
src="https://github.com/user-attachments/assets/7d770100-7531-40d9-89d7-08c7b9e434b4"
/>



### Asset Licenses
The following assets that **have not** been created by myself are
included in this PR:

| Path | Original Author | License |
| --- | --- | --- |
| icons/accent_tags.dmi _reade_ | louiseisnthome | CC0 |

html/changelogs/kermit-reade-accent-icon.yml

@@ -0,0 +1,7 @@
+################################
+author: kermit, louiseisnthome
+
+delete-after: True
+
+changes:
+  - imageadd: "Changes the Reade accent icon from purple splodges to one that represents the gas giant."