v0.27.21

Documenter v0.27.21

Diff since v0.27.20

A bugfix release. The changes are documented in the CHANGELOG.md file.

Closed issues:

• doctest() fails when git is not installed (#1870)

Merged pull requests:

• Merge CI jobs into single workflow (#1867) (@mortenpi)
• Handle missing Git in git_remote_head_branch (#1871) (@mortenpi)
• Fix nightly tests (#1873) (@mortenpi)
• Backports for 0.27.21 (#1874) (@mortenpi)
• Regenerate favicon to increase resolution. (#1875) (@fredrikekre)