fix(workflows): SAFE_TAG error

Author: lowking

.github/workflows/test-install.yml

@@ -34,7 +34,6 @@ jobs:
 
       - name: Set up docker container for ${{ matrix.distro }}
         run: |
-          SAFE_TAG="${{ matrix.distro//[:\/]/-}}"
           echo "FROM ${{ matrix.distro }}" > Dockerfile
           echo "COPY install.sh /install.sh" >> Dockerfile
           echo 'RUN chmod +x /install.sh' >> Dockerfile
@@ -55,10 +54,10 @@ jobs:
 
       - name: Build the test container
         run: |
-          SAFE_TAG="${{ matrix.distro//[:\/]/-}}"
+          SAFE_TAG=$(echo "${{ matrix.distro }}" | tr ':/' '-')
           docker build -t installsh-test:$SAFE_TAG .
 
       - name: Run install.sh in container
         run: |
-          SAFE_TAG="${{ matrix.distro//[:\/]/-}}"
+          SAFE_TAG=$(echo "${{ matrix.distro }}" | tr ':/' '-')
           docker run --rm installsh-test:$SAFE_TAG bash -c "cd /home/testuser && bash /install.sh"