fix(deps): update dependency dotenv to v16

Author: renovate[bot]

package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@11ty/eleventy": "^0.12.0",
     "concurrent-transform": "^1.0.0",
-    "dotenv": "^8.0.0",
+    "dotenv": "^16.0.0",
     "git-url-parse": "11.6.0",
     "gulp": "^4.0.0",
     "gulp-clean": "^0.4.0",