Revert "routine-sprint-releases.md: make sure we bump version number"

This reverts commit 5132ab6a because it was
actually redundant. My bad that I didn't read the full list :-(.

Part of https://github.com/ooni/probe-engine/issues/689

.github/ISSUE_TEMPLATE/routine-sprint-releases.md

@@ -7,7 +7,6 @@ assignees: bassosimone
 
 ---
 
-- [ ] Update the version number
 - [ ] Update dependencies
 - [ ] Update internal/httpheader/useragent.go
 - [ ] Update version/version.go