Remove LLM Card & more updates! (#72)

* Remove the Build your own LLM card as YSWS has expired

Remove the "Build Your Own LLM" card from the `manifest.js` file.

* Remove the card with properties: `name: "Build Your Own LLM"`, `description: "Learn to build and customize your own language model from scratch. Share your work by October 1st to get a free YubiKey and book!"`, `icon: "code"`, `external: true`, `url: "https://hackclub.slack.com/archives/C01FXNNF6F2/p1725326501200079"`, `forUseBy: "clubbers"`.

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/hackclub/toolbox?shareId=XXXX-XXXX-XXXX-XXXX).

* Update International Posters title, link, and description

Update the title, link, and description for the "Posters - Europe" section in `manifest.js`.

* Change the title from "Posters - Europe" to "International Posters"
* Update the link from "https://hack.club/eu-posters" to "https://hack.club/intl-posters"
* Update the description to include the message "If you're outside of US/Canada, get large Hack Club posters to promote your Hack Club"

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/leowilkin/toolbox?shareId=XXXX-XXXX-XXXX-XXXX).

* Add note about Brilliant Premium access

Add a note to the Brilliant Premium perk page indicating that it may look like you don't have premium, but you'll still be able to access all the courses.

* Modify `content/brilliant.mdx` to include the new note at the end of the file.

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/leowilkin/toolbox?shareId=XXXX-XXXX-XXXX-XXXX).

content/brilliant.mdx

@@ -8,3 +8,5 @@
 Brilliant is a online platform for learning STEM topics using interactive learning. Brilliant Premium unlocks all courses on Brilliant.
 
 Brilliant is offering all Hack Clubbers free Brilliant Premium. Fill out this form <Code>recYV0odLlxdaBpgV</Code> to get Brilliant Premium!
+
+Note: It may look like you don't have premium, but you'll still be able to access all the courses.

manifest.js

@@ -45,11 +45,11 @@ export default [
         forUseBy: "leaders",
       },
       {
-        name: "Posters - Europe",
-        description: "If you're in Europe, get large Hack Club posters to promote your Hack Club",
+        name: "International Posters",
+        description: "If you're outside of US/Canada, get large Hack Club posters to promote your Hack Club",
         icon: "docs-fill",
         external: true,
-        url: "https://hack.club/eu-posters",
+        url: "https://hack.club/intl-posters",
         forUseBy: "leaders",
       },
       {
@@ -84,14 +84,6 @@ export default [
         url: "https://codecrafters.io/event/hackclub",
         forUseBy: "clubbers",
       },
-      {
-        name: "Build Your Own LLM",
-        description: "Learn to build and customize your own language model from scratch. Share your work by October 1st to get a free YubiKey and book!",
-        icon: "code",
-        external: true,
-        url: "https://hackclub.slack.com/archives/C01FXNNF6F2/p1725326501200079",
-        forUseBy: "clubbers",
-      },
       {
         name: "Branding & Logos",
         description: "Make anything Hack Club branded",