Bump actions/setup-python from 2 to 3 (#61)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Check out repository
         uses: actions/checkout@v2
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 
@@ -39,7 +39,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 
@@ -70,7 +70,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 
@@ -101,7 +101,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 
@@ -132,7 +132,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 
@@ -165,7 +165,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python 
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5
 

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
           uses: actions/checkout@v2
 
         - name: Set up python
-          uses: actions/setup-python@v2
+          uses: actions/setup-python@v3
           with:
             python-version: 3.8.5
 

.github/workflows/update_doc.yml

@@ -10,7 +10,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8.5