Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/build_tests.yml

@@ -11,7 +11,7 @@ jobs:
         with:
           ref: ${{ github.head_ref }}
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/license_tests.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/publish_alpha.yml

@@ -27,7 +27,7 @@ jobs:
           ref: dev
           fetch-depth: 0 # otherwise, there would be errors pushing refs to the destination repository.
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/publish_build.yml

@@ -13,7 +13,7 @@ jobs:
           ref: dev
           fetch-depth: 0 # otherwise, there would be errors pushing refs to the destination repository.
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/publish_major.yml

@@ -13,7 +13,7 @@ jobs:
           ref: dev
           fetch-depth: 0 # otherwise, there would be errors pushing refs to the destination repository.
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/publish_minor.yml

@@ -13,7 +13,7 @@ jobs:
           ref: dev
           fetch-depth: 0 # otherwise, there would be errors pushing refs to the destination repository.
       - name: Setup Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install Build Tools

.github/workflows/unit_tests.yml

@@ -40,7 +40,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install System Dependencies