fix linux workflow hidapitester --list test

Author: todbot

.github/workflows/linux.yml

@@ -37,7 +37,8 @@ jobs:
 
       - name: run hidapitester (Makefile)
         shell: bash
-        run: ./hidapitester --version && ./hidapitester --list 2>&1 || grep -q "No HID devices found"
+        run: |
+          ./hidapitester --version && output=$(./hidapitester --list 2>&1) || [[ "$output" == *"No HID devices found"* ]]
 
       - name: Configure hidapitester with CMake
         run: |
@@ -48,7 +49,8 @@ jobs:
         run: cmake --build build --config Release
 
       - name: Run hidapitester (CMake)
-        run: ./build/hidapitester --version && ./hidapitester --list 2>&1 || grep -q "No HID devices found"
+        run: |
+          ./hidapitester --version && output=$(./hidapitester --list 2>&1) || [[ "$output" == *"No HID devices found"* ]]
         # (we need the grep guard because Linux runners no longer return any devices)
 
       - name: Upload hidapitester artifacts (PR)