use uv to download smokeshow in ci

Author: samuelcolvin

.github/workflows/coverage.yaml

@@ -13,12 +13,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/setup-python@v5
+      - uses: astral-sh/setup-uv@v5
         with:
+          enable-cache: true
           python-version: '3.12'
 
-      - run: pip install 'smokeshow>=0.5'
-
       - uses: dawidd6/action-download-artifact@v6
         with:
           workflow: ci.yml
@@ -27,7 +26,7 @@ jobs:
           workflow_conclusion: completed
           if_no_artifact_found: warn
 
-      - run: smokeshow upload coverage-html
+      - run: uvx smokeshow upload coverage-html
         if: hashFiles('coverage-html/*.html') != ''
         env:
           SMOKESHOW_GITHUB_STATUS_DESCRIPTION: Coverage {coverage-percentage}
@@ -37,7 +36,7 @@ jobs:
           SMOKESHOW_GITHUB_PR_HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
           SMOKESHOW_AUTH_KEY: ${{ secrets.SMOKESHOW_AUTH_KEY }}
 
-      - run: smokeshow upload diff-coverage-html
+      - run: uvx smokeshow upload diff-coverage-html
         if: hashFiles('diff-coverage-html/*.html') != ''
         env:
           SMOKESHOW_GITHUB_STATUS_DESCRIPTION: Diff coverage {coverage-percentage}