Bug#1029239: project moved to git.sr.ht - watch file

[Piotr Ożarowski]

Hi,

Looks like imv moved from github to git.sr.ht.
Here's an updated debian/watch file that detects 4.4.0 version:

| version=4
| https://git.sr.ht/~exec64/imv \
| /~exec64/imv/archive/@ANY_VERSION@@ARCHIVE_EXT@