update workflow files

.github/workflows/cron-staging.yml

@@ -53,10 +53,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.12
       - name: Pip cache
         uses: actions/cache@v4
         with:

.github/workflows/docs_dev.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.8'
+        python-version: '3.12'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/docs_release.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.8'
+        python-version: '3.12'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -25,7 +25,7 @@ jobs:
     - name: Build docs
       env:
         QISKIT_DOCS_BUILD_TUTORIALS: 'always'
-      run: EXPERIMENTS_DEV_DOCS=1 PROD_BUILD=1 tox -edocs
+      run: PROD_BUILD=1 tox -edocs
     - name: Bypass Jekyll Processing # Necessary for setting the correct css path
       run: touch docs/_build/html/.nojekyll
     - name: Deploy

.github/workflows/docs_stable.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.8'
+          python-version: '3.12'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

.github/workflows/main.yml

@@ -88,10 +88,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up Python 3.8
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.12
       - name: Pip cache
         uses: actions/cache@v4
         with: