Bump checkout

No effects were observed on Make-managed files.

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
           - '3.14'
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Install visualization dependency
       run: sudo apt-get install --yes libegl1