workflows: fix markers

Fix markers.

Signed-off-by: Giacomo Dematteis <[email protected]>

.github/workflows/on_target.yml

@@ -93,16 +93,17 @@ jobs:
         run: |
           mkdir -p results
 
-          if [ "${{ inputs.pytest_marker }}" == "no_markers_flag" ]; then
-            real_pytest_marker=""
+          if [[ '${{ inputs.pytest_marker }}' == 'no_markers_flag' ]]; then
+            real_pytest_marker=''
           else
-            real_pytest_marker="${{ inputs.pytest_marker }}"
+            real_pytest_marker='${{ inputs.pytest_marker }}'
           fi
 
-          pytest -v $real_pytest_marker \
+          pytest -v ${real_pytest_marker} \
             --junit-xml=results/test-results.xml \
             --html=results/test-results.html --self-contained-html \
             ${{ inputs.pytest_path }}
+        shell: bash
         env:
           SEGGER: ${{ secrets.SEGGER_DUT_1 }}
           SEGGER_NRF53: ${{ secrets.SEGGER_DUT_2_EXT_DBG }}