Use "npm update" to install dependencies

We don't want to build our npm package, just get our development
dependencies.

.github/workflows/lint.yml

@@ -8,12 +8,12 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
-      - run: npm install
+      - run: npm update
       - run: npm run lint
   html:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
-      - run: npm install
+      - run: npm update
       - run: git ls-tree --name-only -r HEAD | grep -E "[.](html|css)$" | xargs ./utils/validate

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
-      - run: npm install
+      - run: npm update
       - run: npm run test
         env:
           TEST_BROWSER_NAME: ${{ matrix.browser }}

.github/workflows/translate.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
-      - run: npm install
+      - run: npm update
       - run: sudo apt-get install gettext
       - run: make -C po update-pot
       - run: make -C po update-po