chore(deps): update actions/setup-python action to v4 (#223)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>
Co-authored-by: Ilya Gurov <gurovilya9@gmail.com>
Co-authored-by: Astha Mohta <35952883+asthamohta@users.noreply.github.com>

Author: 4 people

.github/workflows/test_suite.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install nox
@@ -27,7 +27,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install nox
@@ -51,7 +51,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install nox
@@ -75,7 +75,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install nox
@@ -99,7 +99,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install nox