chore: configures Dependabot to skip non-LTS @types/node versions (#297)

* Initial plan

* Update Dependabot config to skip non-LTS versions of @types/node

Co-authored-by: Addono <15435678+Addono@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Addono <15435678+Addono@users.noreply.github.com>

Author: Copilot

.github/dependabot.yml

@@ -20,7 +20,8 @@ updates:
       - "yarn"
       - "dependencies"
     ignore:
-      # Ignore any newer version of Node types, since we will stay on
-      # Node 20 LTS for now
+      # Ignore non-LTS versions of Node types (odd-numbered major versions)
+      # LTS versions are even-numbered: 18, 20, 22, 24, 26, etc.
       - dependency-name: "@types/node"
-        versions: [">=21"]
+        update-types: ["version-update:semver-major"]
+        versions: ["19.x", "21.x", "23.x", "25.x", "27.x", "29.x", "31.x"]