Reverted order of steps in test_linux job

Author: oleksandr-pavlyk

.github/workflows/conda-package.yml

@@ -116,11 +116,11 @@ jobs:
         uses: actions/download-artifact@v2
         with:
           name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
+      - name: Add conda to system path
+        run: echo $CONDA/bin >> $GITHUB_PATH
       - name: Install conda-build
         # Needed to be able to run conda index
         run: conda install conda-build
-      - name: Add conda to system path
-        run: echo $CONDA/bin >> $GITHUB_PATH
       - name: Create conda channel
         run: |
           mkdir -p $GITHUB_WORKSPACE/channel/linux-64