Adding a date avoids that:
“I’ll be migrating the build system on Wednesday (26th); please let me know if you have any concerns.”
https://www.goodreads.com/book/show/16158601-turn-the-ship-a...
We’re informing the manager of our intention, but we already decided it was a good idea at the engineering level. We’re not really soliciting input, eg, whether that’s a good idea or not. However, there might be conflicts we’re not aware of, eg, “Wednesday is bad, since there’s a demo that day.”
Asking if there are concerns is soliciting that information — but being clear about what you’re asking.
“I'm planning on migrating the build system on Wednesday (26th); please let me know if you have any concerns.”
The original wording makes it sound like it's already been settled, so nobody will bother responding. But by saying planning, you might get some feedback.
Both of those might be unnecessarily aggressive terms, but I'm not sure what another one-word term for "time something is going to get done unless you object" is.