Update dependency dotenv to ^16.4.1

Author: renovate[bot]

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@digicatapult/wasp-deti-power",
-  "version": "1.0.55",
+  "version": "1.0.56",
   "type": "module",
   "description": "Payload processing service for WASP",
   "main": "app/index.js",
@@ -31,7 +31,7 @@
   "homepage": "https://github.com/digicatapult/wasp-deti-power#readme",
   "dependencies": {
     "@digicatapult/wasp-payload-processor": "^1.1.89",
-    "dotenv": "^16.4.0",
+    "dotenv": "^16.4.1",
     "envalid": "^7.3.1"
   },
   "devDependencies": {