chore(deps): update commitlint monorepo to v20

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
     "@bifravst/http-api-mock": "2.1.430",
     "@bifravst/prettier-config": "1.1.17",
     "@bifravst/run": "1.2.0",
-    "@commitlint/config-conventional": "19.8.1",
+    "@commitlint/config-conventional": "20.5.0",
     "@hello.nrfcloud.com/bdd-markdown-steps": "2.8.557",
     "@swc/cli": "0.8.0",
     "@swc/core": "1.15.21",
@@ -57,7 +57,7 @@
     "chalk": "5.6.2",
     "check-node-version": "4.2.1",
     "commander": "14.0.3",
-    "commitlint": "19.8.1",
+    "commitlint": "20.5.0",
     "constructs": "10.4.5",
     "husky": "9.1.7",
     "jsonata": "2.1.0",