Update CI

Author: stevapple

.github/workflows/CI.yml

@@ -4,25 +4,23 @@ on: [push]
 
 jobs:
   test-cloud:
-    name: Test on Builder Environment
+    name: Test on SCF Environment
     runs-on: ubuntu-latest
     strategy:
       matrix:
         version:
-          - nightly-master
-        os:
-          - centos7
-          - amazonlinux2
+          - nightly
+          - 5.2.5
     container:
-      image: swiftlang/swift:${{ matrix.version }}-${{ matrix.os }}
+      image: stevapple/swift-scf:${{ matrix.version }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Test
         run: swift test --enable-test-discovery
 
   test-linux:
-    name: Test on Other Linux
+    name: Test on Linux
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -31,8 +29,9 @@ jobs:
           - focal
           - amazonlinux2
           - centos8
+          - centos7
     container:
-      image: swift:5.2.4-${{ matrix.os }}
+      image: swift:5.2.5-${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2