ci: update mise to 2025.4.8

Changelogs:
- https://github.com/jdx/mise/releases/tag/v2025.4.5
- https://github.com/jdx/mise/releases/tag/v2025.4.6
- https://github.com/jdx/mise/releases/tag/v2025.4.7
- https://github.com/jdx/mise/releases/tag/v2025.4.8

Author: php-coder

.github/workflows/integration-tests.yml

@@ -85,7 +85,7 @@ jobs:
       - name: Install mise to install Hurl
         uses: jdx/mise-action@v2.2.1 # https://github.com/jdx/mise-action
         with:
-          version: 2025.4.4        # [default: latest] mise version to install
+          version: 2025.4.8        # [default: latest] mise version to install
           install: true            # [default: true] run `mise install`
           cache: true              # [default: true] cache mise using GitHub's cache
           log_level: info          # [default: info] log level