Herald Transcripts: Use μs instead of us for microseconds
Summary:
Use Unicode abbreviation `μs` for microseconds instead of ASCII `us` which made me wonder for a while what that is.
`mb_chr` is available since PHP 7.2.0 (which Phorge requires). Entering μ directly makes lint bark about "Bad Charset".
Test Plan:
Go to http://phorge.localhost/herald/transcript/1/profile/ and look at values in the "Cost" column.
Works with PHP 8.3; no clue which prehistoric PHP versions may have problems.
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Differential Revision: https://we.phorge.it/D25942