Use python3.8 to build release and upgrade actions/setup-python@v4

Signed-off-by: Timothy Lee <ctiml@infuseai.io>

Author: ctiml

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies

.github/workflows/graphql-format.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.8"
       - uses: actions/setup-node@v2

.github/workflows/release.yml

@@ -14,12 +14,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ 3.6 ]
+        python-version: [ 3.8 ]
 
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies