use powershell

Author: Vahid Tavanashad

.github/workflows/conda-package.yml

@@ -382,16 +382,18 @@ jobs:
           python -c "import dpnp; print(dpnp.__version__)"
 
       - name: Run tests
+        shell: pwsh
         if: env.rerun-tests-on-failure != 'true'
         run: |
-          if ("${{ matrix.python }}" == "${{ env.python-ver-test-all-dtypes }}") {
+          if ("${{ matrix.python }}" -eq "${{ env.python-ver-test-all-dtypes }}") {
             set DPNP_TEST_ALL_INT_TYPES=1
             python -m pytest -ra --pyargs ${{ env.package-name }}.tests
           } else {
             python -m pytest -n auto -ra --pyargs ${{ env.package-name }}.tests
           }
 
       - name: Run tests
+        shell: pwsh
         if: env.rerun-tests-on-failure == 'true'
         id: run_tests_win
         uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3.0.2
@@ -400,7 +402,7 @@ jobs:
           max_attempts: ${{ env.rerun-tests-max-attempts }}
           retry_on: any
           command: |
-            if ( "${{ matrix.python }}" == "${{ env.python-ver-test-all-dtypes }}" ) {
+            if ( "${{ matrix.python }}" -eq "${{ env.python-ver-test-all-dtypes }}" ) {
               set DPNP_TEST_ALL_INT_TYPES=1
               python -m pytest -ra --pyargs ${{ env.package-name }}.tests
             } else {