Make LSP status message match new font size of diagnostic message (#2796)

The status bar diagnostic message font size was updated in
1f65effe57
but the LSP status message font size remained the same causing a font
size change when swapping between the two

![CleanShot 2023-07-26 at 18 32
13](https://github.com/zed-industries/zed/assets/30666851/8d357f46-3a48-4ed1-9832-d24b4b2be4a8)
![CleanShot 2023-07-26 at 18 30
56](https://github.com/zed-industries/zed/assets/30666851/e4ce9911-f66d-4bc3-b951-78196da44176)

Release Notes:

- Fixed an inconsistency in status bar font size.

styles/src/style_tree/status_bar.ts

@@ -44,7 +44,7 @@ export default function status_bar(): any {
                 icon_spacing: 4,
                 icon_width: 14,
                 height: 18,
-                message: text(layer, "sans"),
+                message: text(layer, "sans", { size: "xs" }),
                 icon_color: foreground(layer),
             },
             state: {