fix: fix set-output in workflow

Author: willkg

.github/workflows/test.yml

@@ -23,12 +23,12 @@ jobs:
       - name: Get pip cache dir
         id: pip-cache
         run: |
-          echo "::set-output name=dir::$(pip cache dir)"
+          echo "PIP_CACHE_DIR=$(pip cache dir)" >> $GITHUB_OUTPUT
 
       - name: Cache
         uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
-          path: ${{ steps.pip-cache.outputs.dir }}
+          path: ${{ steps.pip-cache.outputs.PIP_CACHE_DIR }}
           key:
             ${{ matrix.os }}-${{ matrix.python-version }}-${{ hashFiles('**/setup.py') }}
           restore-keys: |