The hours in time must be separated from the minutes by the colon character (for all non British geo-locations)

[gaby-de-wilde]

To live up to the spirits of ISO 8601 a syntactical-descriptive colons shall be used to separate the numbers indicating hours, minutes, and seconds in such abbreviated measures of time.

https://www.iso.org/standard/40874.html
https://en.wikipedia.org/wiki/Colon_(punctuation)#Syntactical-descriptive

note:

British English uses a point for this purpose but that is not important right now.

[slavaaaaaaaaaa]

The reason I didn't do this is the true devops style: pretty formatting. That said, I'll accept a PR if you throw this one-liner in!