chore: Run latest CI jobs on AL2023

Author: jbelkins

.github/workflows/continuous-integration.yml

@@ -175,14 +175,12 @@ jobs:
           - 5.9-jammy
           - 5.9-rhel-ubi9
           - 6.2-noble
-          - 6.3-rhel-ubi9
+          - 6.3-amazonlinux2023
     container:
       image: swift:${{ matrix.swift }}
-    env:
-      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
     steps:
       - name: Checkout smithy-swift
-        uses: actions/checkout@v4
+        uses: actions/checkout
       - name: Install openssl
         run: |
           if [ -x "$(command -v apt)" ]; then
@@ -210,11 +208,9 @@ jobs:
           - 5.9-jammy
           - 5.9-rhel-ubi9
           - 6.2-noble
-          - 6.3-rhel-ubi9
+          - 6.3-amazonlinux2023
     container:
       image: swift:${{ matrix.swift }}
-    env:
-      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
     steps:
       - name: Install openssl
         run: |