Fix GH Actions

.github/workflows/build_documentation.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.10]
+        python-version: ['3.10']
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/publish_to_pypi.yml

@@ -7,14 +7,17 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.10']
 
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python
+    - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
-        python-version: '^3.10'
+        python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |

.github/workflows/pytest.yml

@@ -5,14 +5,17 @@ on: [workflow_dispatch, push, pull_request]
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.10']
 
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python
+    - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
-        python-version: '^3.10'
+        python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |