ci: Update action versions.

Author: gcoguiec

Diff for: .github/workflows/ci.yml

@@ -13,13 +13,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source.
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup pnpm.
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v3
       - name: Setup node.
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 21
+          node-version: 22
           cache: pnpm
       - name: Install dependencies.
         run: pnpm install --frozen-lockfile
@@ -36,16 +36,16 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [21]
+        node-version: [22]
         os: [ubuntu-latest]
       fail-fast: false
     steps:
       - name: Checkout source.
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup pnpm.
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v3
       - name: Setup node (${{ matrix.node-version }}).
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
           cache: pnpm