### Describe the issue

I set `axios.defaults.headers.common['Content-Type'] = 'application/json'`. When firing a `axios.patch` request (without a config), the request uses `application/x-www-form-urlencoded` instead.

### Example Code

```js
// This does not work as expected:
axios.defaults.headers.common['Content-Type'] = 'application/json'

// This does:
axios.defaults.headers.common['Content-Type'] = 'application/json'
axios.defaults.headers.patch['Content-Type'] = 'application/json'
```


### Expected behavior

I expected POST requests to use `axios.defaults.headers.common`, too.

I think this is where the problem (or intended behaviour) comes from: https://github.com/axios/axios/blob/3f53eb6960f05a1f88409c4b731a40de595cb825/lib/core/dispatchRequest.js#L46

### Axios Version

1.4.0

### Adapter Version

_No response_

### Browser

Firefox

### Browser Version

116.0.3 (64-bit)

### Node.js Version

_No response_

### OS

_No response_

### Additional Library Versions

_No response_

### Additional context/Screenshots

_No response_
lib/core/Axios.js
promise = dispatchRequest.call(this, newConfig);
    } catch (error) {
      return Promise.reject(error);
    }
    i = 0;
    len = responseInterceptorChain.length;
    while (i < len) {
      promise = promise.then(responseInterceptorChain[i++], responseInterceptorChain[i++]);
    }
    return promise;
  }
  getUri(config) {
    config = mergeConfig(this.defaults, config);
    const fullPath = buildFullPath(config.baseURL, config.url);
    return buildURL(fullPath, config.params, config.paramsSerializer);
  }
}
utils.forEach(['delete', 'get', 'head', 'options'], function forEachMethodNoData(method) {
  
  Axios.prototype[method] = function(url, config) {
    return this.request(mergeConfig(config || {}, {
      method,
      url,
      data: (config || {}).data
    }));
  };
});
utils.forEach(['post', 'put', 'patch'], function forEachMethodWithData(method) {
  
  function generateHTTPMethod(isForm) {