update release notes

_locales/en/messages.json

@@ -6483,24 +6483,16 @@
     "message": "Small tweaks, bug fixes, and performance enhancements. Thanks for using Signal!",
     "description": "Release notes for releases that only include bug fixes"
   },
-  "icu:WhatsNew__v6.10--0": {
-    "messageformat": "Click on any picture or video and use the new Forward and Backward buttons in the media viewer to take a visual walk down memory lane.",
-    "description": "Release notes for v6.10"
-  },
-  "icu:WhatsNew__v6.10--1": {
-    "messageformat": "Voice messages are now saved as drafts if you switch to another chat while a recording is in progress.",
-    "description": "Release notes for v6.10"
-  },
-  "icu:WhatsNew__v6.10--2": {
-    "messageformat": "Sending a sticker no longer causes draft text to get cleared. Thanks, {lamemakes}!",
-    "description": "Release notes for v6.10"
-  },
-  "icu:WhatsNew__v6.10--3": {
-    "messageformat": "We'd also like to thank {norstbox} for bringing the conversation search bar icons back into alignment.",
-    "description": "Release notes for v6.10"
-  },
   "icu:WhatsNew__v6.11--0": {
     "messageformat": "Start talking to yourself even faster with a new icon that makes the “Note to Self” chat easier to find. Thanks to {hackerbirds} on GitHub for their contribution.",
     "description": "Release notes for v6.11"
+  },
+  "icu:WhatsNew__v6.12--0": {
+    "messageformat": "Now you can select multiple messages and forward or delete them all at once.",
+    "description": "Release notes for v6.12"
+  },
+  "icu:WhatsNew__v6.12--1": {
+    "messageformat": "We updated the Sticker Creator with a few design tweaks and added some helpful tips for aspiring sticker artists. The Sticker Creator now opens in your web browser, which makes Signal Desktop a little smaller and leaves a bit more room on your hard drive for all of your favorite sticker packs.",
+    "description": "Release notes for v6.12"
   }
 }

ts/components/WhatsNewModal.tsx

@@ -31,10 +31,12 @@ const releaseNotes: ReleaseNotesType = {
   version: window.getVersion?.(),
   features: [
     {
-      key: 'icu:WhatsNew__v6.11--0',
-      components: {
-        hackerbirds: <a href="https://github.com/hackerbirds">@hackerbirds</a>,
-      },
+      key: 'icu:WhatsNew__v6.12--0',
+      components: {},
+    },
+    {
+      key: 'icu:WhatsNew__v6.12--1',
+      components: {},
     },
   ],
 };