enhance: Sync proxy.maxTaskNum defaual value to 1024 (#40072)

Sync milvus.yaml value to default value for maxTaskNum

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Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

pkg/util/paramtable/component_param.go

@@ -1492,7 +1492,7 @@ func (p *proxyConfig) init(base *BaseTable) {
 	p.MaxTaskNum = ParamItem{
 		Key:          "proxy.maxTaskNum",
 		Version:      "2.2.0",
-		DefaultValue: "10000",
+		DefaultValue: "1024",
 		Doc:          "The maximum number of tasks in the task queue of the proxy.",
 		Export:       true,
 	}