Bump trix from 2.1.17 to 2.1.18 (#129)

Bumps [trix](https://github.com/basecamp/trix) from 2.1.17 to 2.1.18.
- [Release notes](https://github.com/basecamp/trix/releases)
- [Commits](basecamp/trix@v2.1.17...v2.1.18)

---
updated-dependencies:
- dependency-name: trix
  dependency-version: 2.1.18
  dependency-type: direct:production
...

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Author: dependabot[bot]

package-lock.json

@@ -9,7 +9,7 @@
     "autoprefixer": "^10.4.16",
     "esbuild": "^0.25.0",
     "postcss": "^8.4.32",
-    "trix": "^2.1.17"
+    "trix": "^2.1.18"
   },
   "scripts": {
     "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=/assets",