Update docs/en/3-guides/3.3-how-to-upload-data.md

Improve dropzone docs wording

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: david-roper

docs/en/3-guides/3.3-how-to-upload-data.md

@@ -35,7 +35,7 @@ Open Data Capture allows you to visualize numeric measures over time in a single
 
 6.  **Uploading Using Dropzone**
 
-    Once a template is filled it can be dragged and dropped into the fill dropzone. Once this is done the submit button is to be clicked and the data is then verified. If the data follows the correct syntax then it is submitted to said instrumented data table, else it display an error for which field is filled incorrectly.
+    Once a template is filled, it can be dragged and dropped into the file dropzone. After this, click the submit button to verify the data. If the data follows the correct syntax, it is submitted to the instrument's data table; otherwise, an error is displayed indicating which field is filled incorrectly.
 
 7.  **Uploading specific Zod Data**