Revert "changed version of actions in pytest.yml"

This reverts commit e308c66.

Author: ethanreidel

.github/workflows/pytest.yml

@@ -70,9 +70,9 @@ jobs:
           sudo apt-get install -y nodejs
           sudo mkdir -p /opt/hostedtoolcache/
           sudo chmod 777 -R /opt/hostedtoolcache/
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -88,7 +88,7 @@ jobs:
 
       - name: pip cache
         if: ${{ !env.ACT }}
-        uses: actions/cache@v4
+        uses: actions/cache@v2
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-py${{ matrix.python-version }}-torch${{ matrix.pytorch-version }}-${{ matrix.test-markers }}-${{ hashFiles('requirements*.txt', '.github/workflows/pytest.yml') }}
@@ -192,7 +192,7 @@ jobs:
 
       - name: Upload Unit Test Results
         if: ${{ always() && !env.ACT }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v2
         with:
           name: Unit Test Results (Python ${{ matrix.python-version }} ${{ matrix.test-markers }})
           path: pytest.xml
@@ -230,9 +230,9 @@ jobs:
 
     timeout-minutes: 90
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Set up Python 3.10
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v2
         with:
           python-version: "3.10"
 
@@ -286,9 +286,9 @@ jobs:
 
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Set up Python 3.9
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v2
         with:
           python-version: 3.9
 
@@ -327,9 +327,9 @@ jobs:
 
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Set up Python 3.8
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v2
         with:
           python-version: 3.8
 
@@ -367,9 +367,9 @@ jobs:
 
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
       - name: Set up Python 3.8
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v2
         with:
           python-version: 3.8
 
@@ -560,7 +560,7 @@ jobs:
     steps:
       - name: Upload
         if: ${{ !env.ACT }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v2
         with:
           name: Event File
           path: ${{ github.event_path }}