fix: correct recipe count to 425, scope site count to recipes section

README had 426 (off by one due to _index.md). Homepage and footer now
use where .Site.RegularPages "Section" "recipes" to exclude non-recipe
pages like /imprint/ from the count.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -1,6 +1,6 @@
 # Bar Pivoine
 
-A moody, editorial cocktail recipe site. 426 recipes from the open cocktail dataset, served with AI-generated photography, client-side search, and a dark amber aesthetic.
+A moody, editorial cocktail recipe site. 425 recipes from the open cocktail dataset, served with AI-generated photography, client-side search, and a dark amber aesthetic.
 
 Live at **[bar.pivoine.art](https://bar.pivoine.art)**
 
@@ -40,7 +40,7 @@ bar/
 │   ├── recipes/
 │   │   ├── _index.md           # Archive front matter
 │   │   └── {slug}/
-│   │       ├── index.md        # Cocktail page (426 bundles)
+│   │       ├── index.md        # Cocktail page (425 bundles)
 │   │       └── cocktail.webp   # AI-generated image (optional)
 │
 ├── layouts/