Fixed variable use in ApplicationTesting.

Author: Paebbels

.github/workflows/ApplicationTesting.yml

@@ -248,7 +248,7 @@ jobs:
         if: matrix.system != 'msys2'
         run: |
           python -m pip install --disable-pip-version-check -U wheel
-          python -m pip install --disable-pip-version-check ${{ inputs.requirements }}
+          python -m pip install --disable-pip-version-check ${{ steps.requirements.outputs.requirements }}
 
       - name: 🔧 Install pip dependencies (MSYS2)
         if: matrix.system == 'msys2'