Add ESP32CertBundle repository link

[tanakamasayuki]

No description provided.

[github-actions]

Hi @tanakamasayuki.
There was an unexpected failure during automated processing of your pull request.
This error is unrelated to the content of your pull request.

A maintainer has been notified and will investigate as soon as possible.

[per1234]

Arduino Lint has suggestions for possible improvements to https://github.com/tanakamasayuki/ESP32CertBundle:

Linting library in ESP32CertBundle
INFO: No header file found matching library name (ESP32CertBundle.h). Best practices are for primary header filename to 
      match library name.
      See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
      (Rule LS008)

Linter results for project: no errors or warnings

-------------------

Linting sketch in ESP32CertBundle/examples/BasicUsage

Linter results for project: no errors or warnings

-------------------

Linter results for projects: no errors or warnings

[per1234]

Your submission has now been accepted! Thanks for your contribution to the Arduino Library Manager index.

The library(s) will be available for installation via Library Manager within a day's time.

You can check the logs from the Library Manager indexer for your library(s) here:
http://downloads.arduino.cc/libraries/logs/github.com/tanakamasayuki/ESP32CertBundle/