CLDSRV-865: Use correct input name for scality-kms release dispatch

The scality-kms release.yaml expects `cloudserver-version` but
cloudserver was passing `tag`, causing HTTP 422 on release.

Author: dvasilas

.github/workflows/release.yaml

@@ -109,4 +109,4 @@ jobs:
           gh workflow run release.yaml \
             --repo scality/scality-kms \
             --ref main \
-            --field tag=${{ github.event.inputs.tag }}
+            --field cloudserver-version=${{ github.event.inputs.tag }}