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#### Describe the issue
I can't post FormData since `"axios": "^0.25.0",`

`Error: Request failed with status code 400`

#### Example Code
```js
export const client = axios.create({
        baseURL: URL_API,
        withCredentials: true,
        responseType: 'json',
	timeout: 30000,
});

const params = new FormData();

params.append('name', data.model);
params.append('idFuel', data.idFuel);
params.append('power', data.idPower);

client.post(`/app/society/${idSociety}/vehicle`, params, { headers: { "Content-Type": "multipart/form-data" } })
```

#### Expected behavior, if applicable
That it works

#### Environment
 - Axios Version: 0.25.0
 - Node.js Version: v14.17.6
 - OS: iOS 15, Android 11 (But on all platforms and versions)
 - Additional Library Versions: React Native 0.64.3

#### Additional context/Screenshots
No problem with  `"axios": "^0.24.0",`

I saw this PR https://github.com/axios/axios/pull/3757 on 0.25.0, but I don't know what I have to change in code.

Thanks for your help 👍

index.d.ts

export type AxiosRequestHeaders = Record<string, string | number | boolean>;
export type AxiosResponseHeaders = Record<string, string> & {
  "set-cookie"?: string[]
};
export interface AxiosRequestTransformer {
  (data: any, headers?: AxiosRequestHeaders): any;
}
export interface AxiosResponseTransformer {
  (data: any, headers?: AxiosResponseHeaders): any;
}
export interface AxiosAdapter {
  (config: AxiosRequestConfig): AxiosPromise;
}
export interface AxiosBasicCredentials {
  username: string;
  password: string;
}
export interface AxiosProxyConfig {
  host: string;
  port: number;
  auth?: {
    username: string;
    password: string;
  };
  protocol?: string;
}
export type Method =
  | 'get' | 'GET'
  | 'delete' | 'DELETE'
  | 'head' | 'HEAD'
  | 'options' | 'OPTIONS'
  | 'post' | 'POST'
  | 'put' | 'PUT'
  | 'patch' | 'PATCH'
  | 'purge' | 'PURGE'
  | 'link' | 'LINK'
  | 'unlink' | 'UNLINK';
export type ResponseType =
  | 'arraybuffer'
  | 'blob'
  | 'document'
  | 'json'
  | 'text'
  | 'stream';
  export type responseEncoding =
  | 'ascii' | 'ASCII'
  | 'ansi' | 'ANSI'
  | 'binary' | 'BINARY'
  | 'base64' | 'BASE64'
  | 'base64url' | 'BASE64URL'
  | 'hex' | 'HEX'
  | 'latin1' | 'LATIN1'
  | 'ucs-2' | 'UCS-2'
  | 'ucs2' | 'UCS2'
  | 'utf-8' | 'UTF-8'
  | 'utf8' | 'UTF8'
  | 'utf16le' | 'UTF16LE';
export interface TransitionalOptions {
  silentJSONParsing?: boolean;
  forcedJSONParsing?: boolean;
  clarifyTimeoutError?: boolean;
}
export interface AxiosRequestConfig<D = any> {
  url?: string;
  method?: Method;
  baseURL?: string;
  transformRequest?: AxiosRequestTransformer | AxiosRequestTransformer[];
  transformResponse?: AxiosResponseTransformer | AxiosResponseTransformer[];
  headers?: AxiosRequestHeaders;
  params?: any;
  paramsSerializer?: (params: any) => string;
  data?: D;
  timeout?: number;
  timeoutErrorMessage?: string;
  withCredentials?: boolean;
  adapter?: AxiosAdapter;
  auth?: AxiosBasicCredentials;
  responseType?: ResponseType;
  respon