fix(editor): inline code style (#12585)

Closes: #12576
Closes: [BS-2080](https://linear.app/affine-design/issue/BS-2080/update-inline-code-font-size)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Style**
  - Improved the appearance of code elements within lists by adjusting font size and padding.
  - Updated inline code styling for better vertical alignment and consistency with surrounding text.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/list/src/styles.ts

@@ -40,6 +40,11 @@ export const listBlockStyles = css`
     font-size: var(--affine-font-base);
   }
 
+  affine-list code {
+    font-size: calc(var(--affine-font-base) - 3px);
+    padding: 0px 4px 2px;
+  }
+
   .affine-list-block-container {
     box-sizing: border-box;
     border-radius: 4px;