Use verify-alpha-spec hook

With the deployment of rapids-build-backend, we need to make sure
our dependencies have alpha specs.

Contributes to rapidsai/build-planning#31

.pre-commit-config.yaml

@@ -32,6 +32,10 @@ repos:
                 additional_dependencies: [types-cachetools]
                 args: ["--module=dask_cuda", "--ignore-missing-imports"]
                 pass_filenames: false
+      - repo: https://github.com/rapidsai/pre-commit-hooks
+        rev: v0.3.0
+        hooks:
+            - id: verify-alpha-spec
       - repo: https://github.com/rapidsai/dependency-file-generator
         rev: v1.13.11
         hooks: