Fix info colors used for hint diagnostics (#54046)

Super small update changing two instances where
`DiagnosticSeverity::HINT` was set to use the color for "info".

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #45637

Release Notes:

- Fixed various instances of hint level diagnostics using the color
designated for info

crates/diagnostics/src/diagnostic_renderer.rs

@@ -206,7 +206,7 @@ impl DiagnosticBlock {
                 (status_colors.warning_background, status_colors.warning)
             }
             DiagnosticSeverity::INFORMATION => (status_colors.info_background, status_colors.info),
-            DiagnosticSeverity::HINT => (status_colors.hint_background, status_colors.info),
+            DiagnosticSeverity::HINT => (status_colors.hint_background, status_colors.hint),
             _ => (status_colors.ignored_background, status_colors.ignored),
         };
         let settings = ThemeSettings::get_global(cx);

crates/editor/src/editor.rs

@@ -29378,7 +29378,7 @@ pub fn diagnostic_style(severity: lsp::DiagnosticSeverity, colors: &StatusColors
         lsp::DiagnosticSeverity::ERROR => colors.error,
         lsp::DiagnosticSeverity::WARNING => colors.warning,
         lsp::DiagnosticSeverity::INFORMATION => colors.info,
-        lsp::DiagnosticSeverity::HINT => colors.info,
+        lsp::DiagnosticSeverity::HINT => colors.hint,
         _ => colors.ignored,
     }
 }