updating version comment for actions/checkout, enabling us to know the version

Signed-off-by: Adam D. Cornett <adc@redhat.com>

Author: acornett21

.github/workflows/gemini-review.yml

@@ -49,7 +49,7 @@ jobs:
           permission-pull-requests: 'write'
 
       - name: 'Checkout repository'
-        uses: 'actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd' # ratchet:actions/checkout@v6
+        uses: 'actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd' # v6.0.2
         with:
           persist-credentials: false