Bump actions/setup-python from 4 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v4...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/client-pypi-release.yaml

@@ -17,7 +17,7 @@ jobs:
       url: https://pypi.org/p/qiskit-ibm-catalog
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         name: Install Python
         with:
           python-version: '3.11'

.github/workflows/coverage.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Set up Python 3.11
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Install tox

.github/workflows/docs.yml

@@ -17,7 +17,7 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Install dependencies

.github/workflows/ecosystem.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Set up Python 3.11
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Install tox

.github/workflows/lint.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Set up Python 3.11
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
       - name: Install tox

.github/workflows/test_latest_versions.yml

@@ -29,7 +29,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies