fix ci.yml

Author: chinayin

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         working-directory: ${{ matrix.major }}/${{ matrix.os }}
         run: |
           echo "repository=${GITHUB_ACTOR}/$(basename ${GITHUB_REPOSITORY})" >> $GITHUB_OUTPUT
-          echo "version=$(grep -oE 'PYTHON_VERSION [0-9].[0-9]+.[0-9]+' Dockerfile | grep -oE '[0-9].[0-9]+.[0-9]+')" >> $GITHUB_OUTPUT
+          echo "version=$(grep -oE 'PYTHON_VERSION=[0-9].[0-9]+.[0-9]+' Dockerfile | grep -oE '[0-9].[0-9]+.[0-9]+')" >> $GITHUB_OUTPUT
           echo "workdir=${{ matrix.major }}/${{ matrix.os }}" >> $GITHUB_OUTPUT
       - name: Set Docker meta
         id: meta