Stick to 3.5.0-180.3.beta

Author: srawlins

.github/workflows/test.yaml

@@ -22,14 +22,17 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        sdk: [dev, stable]
+        # TODO(srawlins): Re-enable 'stable' when it is someday possible for a version solve between analyzer, macros, _macros, and SDK.
+        # sdk: [dev, stable]
+        # sdk: [3.5.0-180.3.beta]
+        sdk: [beta]
         job: [main, flutter, packages, sdk-docs]
         include:
           - os: macos-latest
-            sdk: dev
+            sdk: beta
             job: main
           - os: windows-latest
-            sdk: dev
+            sdk: beta
             job: main
         exclude:
             # Do not try to run flutter against the "stable" sdk,