remove -r from pipx command

Author: patapenka-alexey

.github/workflows/packing.yml

@@ -511,7 +511,7 @@ jobs:
       - name: Install test requirements
         run: |
           apt install -y pipx
-          pipx install -r requirements-test.txt
+          pipx install requirements-test.txt
         if: matrix.target.os == 'debian'
 
       - name: Install the crud module for testing purposes