Source Paystack: enable in cloud (#24085)

* made needed changes for enabling in cloud

* added changelog

* auto-bump connector version

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Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>

airbyte-integrations/connectors/source-paystack/source_paystack/spec.json

@@ -5,7 +5,7 @@
     "title": "Paystack Source Spec",
     "type": "object",
     "required": ["secret_key", "start_date"],
-    "additionalProperties": false,
+    "additionalProperties": true,
     "properties": {
       "secret_key": {
         "type": "string",