fix: 调整获得审批详情接口请求方式和参数类型，流程变量参数使用get请求传递错误

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmProcessInstanceController.java

@@ -158,11 +158,11 @@ public class BpmProcessInstanceController {
         return success(true);
     }
 
-    @GetMapping("/get-approval-detail")
+    @PostMapping("/get-approval-detail")
     @Operation(summary = "获得审批详情")
     @Parameter(name = "id", description = "流程实例的编号", required = true)
     @PreAuthorize("@ss.hasPermission('bpm:process-instance:query')")
-    public CommonResult<BpmApprovalDetailRespVO> getApprovalDetail(@Valid BpmApprovalDetailReqVO reqVO) {
+    public CommonResult<BpmApprovalDetailRespVO> getApprovalDetail(@Valid @RequestBody BpmApprovalDetailReqVO reqVO) {
         return success(processInstanceService.getApprovalDetail(getLoginUserId(), reqVO));
     }