add comments to node versions

Author: keithamus

.github/workflows/ci.yml

@@ -15,9 +15,9 @@ jobs:
     strategy:
       matrix:
         node_version:
-          - 18
-          - 20
-          - 22
+          - 18 # remove May 2025
+          - 20 # remove May 2026
+          - 22 # remove May 2027
           - x.x.x # safety net; don't remove
     steps:
       - uses: actions/checkout@v3