ci(github): use the current npm in the workflows

Node.js 26 bundles npm 11, while local development uses npm 12, so every job that sets up Node.js now updates npm first and installs with the same npm as locally.

Author: d-biehl

.github/workflows/build-test-package-publish.yml

@@ -96,6 +96,10 @@ jobs:
           cache: "npm"
           cache-dependency-path: package-lock.json
 
+      - name: Update npm
+        # Node.js bundles an older npm; use the current one, as in local development.
+        run: npm install -g npm@latest
+
       - name: install node modules
         run: npm install --include=dev
 
@@ -174,6 +178,10 @@ jobs:
           cache: "npm"
           cache-dependency-path: package-lock.json
 
+      - name: Update npm
+        # Node.js bundles an older npm; use the current one, as in local development.
+        run: npm install -g npm@latest
+
       - name: Setup Java
         uses: actions/setup-java@v5
         with:
@@ -275,6 +283,10 @@ jobs:
           cache: "npm"
           cache-dependency-path: package-lock.json
 
+      - name: Update npm
+        # Node.js bundles an older npm; use the current one, as in local development.
+        run: npm install -g npm@latest
+
       - name: install node modules
         run: npm install --include=dev
 

.github/workflows/deploy-docs.yml

@@ -43,6 +43,9 @@ jobs:
         with:
           node-version: 26
           cache: npm
+      - name: Update npm
+        # Node.js bundles an older npm; use the current one, as in local development.
+        run: npm install -g npm@latest
       - name: Setup Pages
         uses: actions/configure-pages@v6
       - name: Install dependencies

.github/workflows/docs-next.yml

@@ -44,6 +44,9 @@ jobs:
           node-version: 26
           cache: npm
           cache-dependency-path: docs-next/package-lock.json
+      - name: Update npm
+        # Node.js bundles an older npm; use the current one, as in local development.
+        run: npm install -g npm@latest
       - name: Install dependencies
         run: npm ci
       - name: Build the preview