explicitly use node 16 for runners

The default node version for the runners was changed to 18, which
is not compatible with our current setup. Unfortunately, this change
was not properly announced, which is why we did not notice it. There is
only a GH issue about it at the moment.
actions/runner-images#7002

In order to fix this, we need to explicitly set the node version to 16
for all our workflows that use node/pnpm.

.github/workflows/format.yml

@@ -13,6 +13,12 @@ jobs:
            uses: actions/checkout@v2
            with:
               token: ${{ secrets.ACTION_PAT }}
+
+         - name: Install Node.js
+           uses: actions/setup-node@v3
+           with:
+              node-version: 16
+
          - name: Setup and cache pnpm
            uses: ./.github/actions/pnpm-setup
          - name: Install workspaces

.github/workflows/jest.yml

@@ -8,9 +8,11 @@ jobs:
       steps:
          - name: Checkout
            uses: actions/checkout@v2
+
          - uses: actions/setup-node@v3
            with:
               node-version: 16
+
          - name: Setup and cache pnpm
            uses: ./.github/actions/pnpm-setup
          - name: Install workspaces

.github/workflows/lint.yml

@@ -13,6 +13,12 @@ jobs:
            uses: actions/checkout@v2
            with:
               token: ${{ secrets.ACTION_PAT }}
+
+         - name: Install Node.js
+           uses: actions/setup-node@v3
+           with:
+              node-version: 16
+
          - name: Setup and cache pnpm
            uses: ./.github/actions/pnpm-setup
          - name: Install workspaces

.github/workflows/main.yml

@@ -20,6 +20,12 @@ jobs:
       steps:
          - name: Checkout
            uses: actions/checkout@v3
+
+         - name: Install Node.js
+           uses: actions/setup-node@v3
+           with:
+              node-version: 16
+
          - name: Start strapi server
            run: cd backend && docker-compose up -d
            env:

.github/workflows/nextjs_bundle_analysis.yml

@@ -19,6 +19,11 @@ jobs:
          - name: Checkout
            uses: actions/checkout@v2
 
+         - name: Install Node.js
+           uses: actions/setup-node@v3
+           with:
+              node-version: 16
+
          - name: Setup and cache pnpm
            uses: ./.github/actions/pnpm-setup
 

.github/workflows/tsc.yml

@@ -8,6 +8,12 @@ jobs:
       steps:
          - name: Checkout
            uses: actions/checkout@v2
+
+         - name: Install Node.js
+           uses: actions/setup-node@v3
+           with:
+              node-version: 16
+
          - name: Setup and cache pnpm
            uses: ./.github/actions/pnpm-setup
          - name: Install workspaces