docs: update frontmatter display to Jetbrains Fleet

Co-authored-by: Atif Ali <[email protected]>

Author: DevelopmentCats

registry/coder/modules/fleet-ide/README.md

@@ -1,5 +1,5 @@
 ---
-display_name: Fleet IDE
+display_name: JetBrains Fleet
 description: Add a one-click button to launch JetBrains Fleet IDE to connect to your workspace.
 icon: ../../../../.icons/jetbrains.svg
 maintainer_github: coder