Update README.md (#3353)

README.md

@@ -36,12 +36,12 @@ You can use [EspExceptionDecoder](https://github.com/me-no-dev/EspExceptionDecod
 ### Issue/Bug report template
 Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as [for reference](https://github.com/espressif/arduino-esp32/issues?utf8=%E2%9C%93&q=is%3Aissue%20label%3A%22for%20reference%22%20).
 
-Finally, if you're sure no one else had the issue, follow the [ISSUE_TEMPLATE](docs/ISSUE_TEMPLATE.md) while reporting any issue.
+Finally, if you are sure no one else had the issue, follow the [ISSUE_TEMPLATE](docs/ISSUE_TEMPLATE.md) while reporting any issue.
 
 ### ESP32Dev Board PINMAP
 
 ![Pin Functions](docs/esp32_pinmap.png)
 
-### Hint
+### Tip
 
 Sometimes to program ESP32 via serial you must keep GPIO0 LOW during the programming process