don't test on Noir beta 3

Author: olehmisar

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toolchain: [1.0.0-beta.3, 1.0.0-beta.4, 1.0.0-beta.5]
+        toolchain: [1.0.0-beta.4, 1.0.0-beta.5]
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4