chore(deps): update commitlint monorepo to v19

Author: renovate[bot]

package.json

@@ -51,8 +51,8 @@
   "devDependencies": {
     "@changesets/changelog-github": "^0.4.4",
     "@changesets/cli": "^2.22.0",
-    "@commitlint/cli": "^17.8.1",
-    "@commitlint/config-conventional": "^17.8.1",
+    "@commitlint/cli": "^19.5.0",
+    "@commitlint/config-conventional": "^19.5.0",
     "@sourcegraph/eslint-config": "^0.29.0",
     "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/stylelint-config": "^1.4.0",