Clean up the JSON code a bit (don’t need that extra filter)

package.json

@@ -6,6 +6,7 @@
     "build": "eleventy",
     "watch": "eleventy --watch",
     "serve": "eleventy --serve",
+    "start": "eleventy --serve",
     "debug": "DEBUG=* eleventy"
   },
   "repository": {
@@ -25,7 +26,7 @@
   "devDependencies": {
     "@11ty/eleventy": "^0.11.0",
     "@11ty/eleventy-navigation": "^0.1.6",
-    "@11ty/eleventy-plugin-rss": "^1.0.7",
+    "@11ty/eleventy-plugin-rss": "^1.0.9",
     "@11ty/eleventy-plugin-syntaxhighlight": "^3.0.1",
     "luxon": "^1.21.3",
     "markdown-it": "^8.4.2",