chore: upgrade OpenAPI spec to v3.2.0 (#16)

Author: flemzord

.speakeasy/workflow.yaml

@@ -3,7 +3,7 @@ speakeasyVersion: latest
 sources:
     stacks-source:
         inputs:
-            - location: https://github.com/formancehq/stack/releases/download/v3.1.0/generate.json
+            - location: https://github.com/formancehq/stack/releases/download/v3.2.0/generate.json
         registry:
             location: registry.speakeasyapi.dev/formance/formance/stacks-source
 targets: