Switch ci.yaml to actions/checkout@v6

Author: eddelbuettel

.github/workflows/ci.yaml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup
         uses: eddelbuettel/github-actions/r-ci@master

ChangeLog

@@ -1,3 +1,7 @@
+2026-02-04  Dirk Eddelbuettel  <edd@debian.org>
+
+	* .github/workflows/ci.yaml: Switch to actions/checkout@v6
+
 2025-10-13  Dirk Eddelbuettel  <edd@debian.org>
 
 	* docs/*: Refreshed with syntax highlighting enabled