fix(deps): update dependency decap-cms to v3.5.0 (#169)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -33,7 +33,7 @@
         "@11ty/eleventy-navigation": "0.3.5",
         "@11ty/eleventy-plugin-rss": "1.2.0",
         "@11ty/eleventy-plugin-syntaxhighlight": "5.0.0",
-        "decap-cms": "3.4.0",
+        "decap-cms": "3.5.0",
         "eleventy-plugin-fluid": "2.7.3",
         "idg-design-system": "1.0.0",
         "infusion": "4.8.0",