Ian Wienand 7577439ff8 grafana: update to 7.4.2
This includes a fix for I216528a76307189d8d87bd2fcfeff95c6ceb53cc.
Now it's released we can be a bit more explicit about why we added the
workaround.

Change-Id: Ibaf1850549b5e7ec3622418b650bc5e59a289ab6
2021-02-19 09:54:31 +11:00
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