Update GitHub Actions workflow to use latest action versions and streamline dependency installation

Author: NripeshN

.github/workflows/examples-test.yml

@@ -101,17 +101,18 @@ jobs:
           # and not fully implemented
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; else pip install -e .; fi
+          pip install -r requirements.txt
+          pip install -e .
         shell: bash
 
       - name: Run ${{ matrix.combination.example }} on ${{ matrix.combination.backend }} backend