README example is missing `bme280_default_init(bme280);` (AEGHB-925)

[gknops]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

The README.md example code, Step 2 should have this additional line at the end:

bme280_default_init(bme280);

Without it the sample code will run but not return any results.

[YanKE01]

Hi, @gknops . Thank you very much! The issue will be fixed as soon as possible.