Update CI SDK + simpler match

Author: isoos

.github/workflows/test.yaml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        sdk: [3.7.0, dev]
+        sdk: [3.8.0, dev]
         job: [main, flutter, packages, sdk-docs]
         include:
           - os: macos-latest
@@ -35,9 +35,9 @@ jobs:
             # Do not try to run flutter against the "stable" sdk,
             # it is unlikely to work and produces uninteresting
             # results.
-          - sdk: 3.7.0
+          - sdk: 3.8.0
             job: flutter
-          - sdk: 3.7.0
+          - sdk: 3.8.0
             job: sdk-docs
 
     steps:

test/end2end/dartdoc_test.dart

@@ -110,7 +110,7 @@ void main() {
       expect(
           useSomethingInAnotherPackage.modelType.linkedName,
           matches(
-              r'<a (class="deprecated" )?href="https://pub.dev/documentation/meta/[^"]*/meta/Required-class.html">Required</a>(\?)?'));
+              r'<a class="deprecated" href="https://pub.dev/documentation/meta/[^"]*/meta/Required-class.html">Required</a>\?'));
       var link = RegExp('/dart-core/String-class.html">String</a>');
       expect(useSomethingInTheSdk.modelType.linkedName, contains(link));
     });