fix: increase font-size-small to 13px

packages/ui/src/styles/theme.css

@@ -4,7 +4,7 @@
   --font-family-mono: "Berkeley Mono", "Berkeley Mono Fallback";
   --font-family-mono--font-feature-settings: "ss01" 1;
 
-  --font-size-small: 12px;
+  --font-size-small: 13px;
   --font-size-base: 14px;
   --font-size-large: 16px;
   --font-size-x-large: 20px;