web: prettier: explicitly specify version to use

Our CI jobs started failing due to the release of prettier 3.0,
which changed the formatting rules.
Specifying a version in `package.json` does not seem to do the trick,
so just specify the version to use when calling prettier via npx.

Signed-off-by: Leonard Göhrs <[email protected]>

Author: hnez

.github/workflows/tacd-webui.yaml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: latest
-      - run: npx prettier --check .
+      - run: npx prettier@=2.8.8 --check .
 
   license:
     name: npx license-checker

README.md

@@ -131,5 +131,5 @@ guidelines:
 - Use `cargo fmt` after every change to the rust codebase
 - Use `cargo deny check license` if you have introduced new dependencies to
   check if they (or their dependencies) introduce license issues.
-- Use `npx prettier --write .` (in the web directory) after every change to the
-  web codebase.
+- Use `npx prettier@=2.8.8 --write .` (in the web directory) after every
+  change to the web codebase.

web/package.json

@@ -17,7 +17,6 @@
     "@types/swagger-ui-react": "^4.11.0",
     "ace-builds": "^1.9.6",
     "paho-mqtt": "^1.1.0",
-    "prettier": "^2.7.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.3.0",