Rename master to main in docs

[niccokunzmann]

We switched to main, see #627.

[coveralls]

Pull Request Test Coverage Report for Build 9598381743

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage remained the same at 97.228%

---

Files with Coverage Reduction	New Missed Lines	%
src/icalendar/timezone/zoneinfo.py	2	94.67%
src/icalendar/tests/test_cli_tool.py	2	88.0%
<!--	Total:	4		-->

Totals
Change from base Build 9598258374:	0.0%
Covered Lines:	3087
Relevant Lines:	3175

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9617122608

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.228%

---

Totals
Change from base Build 9598258374:	0.0%
Covered Lines:	3087
Relevant Lines:	3175

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9626921659

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-97.2%) to 0.0%

---

Totals
Change from base Build 9598258374:	-97.2%
Covered Lines:	0
Relevant Lines:	0

---

💛 - Coveralls

[niccokunzmann]

The coverage report is failing.

Submitting coverage to coveralls.io...
Error running coveralls: Could not submit coverage: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/coveralls/api.py", line 298, in submit_report
    response.raise_for_status()
  File "/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/requests/models.py", line 1024, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/coveralls/cli.py", line 98, in main
    result = coverallz.wear()
Received 422 submitting job via Github Actions. By default, coveralls-python uses the "github" service name, which requires you to set the $GITHUB_TOKEN environment variable. If you want to use a COVERALLS_REPO_TOKEN instead, please manually override $COVERALLS_SERVICE_NAME to "github-actions". For more info, see https://coveralls-python.readthedocs.io/en/latest/usage/configuration.html#github-actions-support
  File "/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/coveralls/api.py", line 275, in wear
    return self.submit_report(json_string)
  File "/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/coveralls/api.py", line 301, in submit_report
    raise CoverallsException(
coveralls.exception.CoverallsException: Could not submit coverage: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs

The coverage token is of the organization. I am not sure what to do with it.