fix: address reviewer comments — input type, deprecated CSS

- expressions.md: type: integer → type: number (matches valid input types)
- global.css: word-break: break-word → overflow-wrap: anywhere (deprecated)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: michaelmcnees

site/src/content/docs/concepts/expressions.md

@@ -55,7 +55,7 @@ inputs:
   name:
     type: string
   count:
-    type: integer
+    type: number
 
 steps:
   - name: greet

site/src/styles/global.css

@@ -403,7 +403,7 @@ mark[data-pagefind-highlight] {
   }
 
   .prose code {
-    word-break: break-word;
+    overflow-wrap: anywhere;
   }
 }