Revert "Bump codecov/codecov-action from 3 to 4"

This reverts commit 244673c.

Author: codingjoe

.github/workflows/ci.yml

@@ -72,7 +72,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install -e '.[test]'
       - run: python -m pytest
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v3
         with:
           flags: ${{ matrix.python-version }}
 
@@ -92,7 +92,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install -e ".[test,${{ matrix.extras }}]"
       - run: python -m pytest
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v3
         with:
           flags: ${{ matrix.extras }}
 
@@ -128,7 +128,7 @@ jobs:
         env:
           DB_PORT: ${{ job.services.postgres.ports[5432] }}
           DB: pg
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v3
         with:
           flags: ${{ matrix.extras }}