Bump actions/checkout to v5

Better to get this done before dependabot starts spamming.

Author: tarsius

.github/workflows/test.yml

@@ -15,14 +15,14 @@ jobs:
         with:
           version: 30.1
       - name: 'Install scripts'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: emacscollective/workflows
           ref: ${{ inputs.workflow_ref }}
           path: _scripts
           persist-credentials: false
       - name: 'Checkout ${{ github.repository }}'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: ${{ env.pwd }}
           persist-credentials: false
@@ -73,14 +73,14 @@ jobs:
         with:
           version: ${{ matrix.emacs }}
       - name: 'Checkout scripts'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: emacscollective/workflows
           ref: ${{ inputs.workflow_ref }}
           path: _scripts
           persist-credentials: false
       - name: 'Checkout ${{ github.repository }}'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: ${{ env.pwd }}
           persist-credentials: false