ci: fix container name formatting

Author: mloubout

.github/workflows/docker-devito.yml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Set per‑runner variables
         run: |
-          echo "CONTAINER_NAME=testrun-${{ matrix.tag }}-$RUNNER_NAME" >> $GITHUB_ENV
+          echo "CONTAINER_NAME=testrun-${{ matrix.tag }}-${RUNNER_NAME// /_}" >> $GITHUB_ENV
 
       - name: Check event name
         run: echo ${{ github.event_name }}

.github/workflows/pytest-gpu.yml

@@ -89,8 +89,8 @@ jobs:
       - name: Set per-runner tags
         run: |
           echo "RUNNER_NAME=$RUNNER_NAME" >> $GITHUB_ENV
-          echo "DOCKER_IMAGE=${{ matrix.name }}-$RUNNER_NAME" >> $GITHUB_ENV
-          echo "CONTAINER_BASENAME=testrun-${{ matrix.name }}-$RUNNER_NAME" >> $GITHUB_ENV
+          echo "DOCKER_IMAGE=${{ matrix.name }}-${RUNNER_NAME// /_}" >> $GITHUB_ENV
+          echo "CONTAINER_BASENAME=testrun-${{ matrix.name }}-${RUNNER_NAME// /_}" >> $GITHUB_ENV
 
       - name: Build docker image
         run: |