chore: migrate to 1.11.0-beta1

Author: remyleone

.github/workflows/acceptance-tests.yaml

@@ -209,6 +209,8 @@ jobs:
         uses: actions/checkout@v5
       - name: Install OpenTofu
         uses: opentofu/setup-opentofu@v1
+        with:
+          tofu_version: '1.11.0-beta1'
       - name: Install Go
         uses: actions/setup-go@v6
         with: