fix: correct codecov-action parameter and simplify for Unix only

- Change 'file' to 'files' parameter for codecov-action@v5
- Remove Windows from test matrix (macOS and Ubuntu only)
- Use simple venv activation without Windows detection
- Use maturin develop as in release branch

Author: thomasrockhu-codecov

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
   run_tests:
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: [macos-latest, ubuntu-latest]
         python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
     runs-on: ${{ matrix.os }}
     steps:
@@ -34,15 +34,13 @@ jobs:
       - name: Install Rust Toolchain
         run: rustup toolchain install stable --profile minimal --no-self-update
       - name: Install requirements
-        shell: bash
         run: |
           python -m venv venv
           source venv/bin/activate
           pip install maturin
           pip install -r tests/requirements.txt
           maturin develop
       - name: Run tests
-        shell: bash
         run: |
           source venv/bin/activate
           python -m pytest --cov-report=xml:coverage.xml --cov=. --junitxml=unit.junit.xml
@@ -53,7 +51,7 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_ORG_TOKEN }}
           url: ${{ secrets.CODECOV_URL }}
-          file: unit.junit.xml
+          files: unit.junit.xml
           disable_search: true
           report_type: test-results
 
@@ -63,6 +61,6 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_ORG_TOKEN_STAGING }}
           url: ${{ secrets.CODECOV_STAGING_API_URL }}
-          file: unit.junit.xml
+          files: unit.junit.xml
           disable_search: true
           report_type: test-results