`use_version()` leaves behind development header if preceding newlines exist in NEWS

[kevinushey]

In renv, I had a NEWS file with the structure:

# renv (development version)

* Fixed an issue where downloads could fail with curl >= 8.7.1. (#1869)

< ... >

Note the leading empty line. When I then ran usethis::use_version("patch"), the NEWS file was modified as:

diff --git a/NEWS.md b/NEWS.md
index bc58b2c79..d2b02c0da 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,5 @@
+# renv 1.0.6
+

 # renv (development version)

Note that the old development version NEWS header was unexpectedly retained. Could the check in:

usethis/R/news.R

Lines 49 to 55 in 9e64daf

	development_title <- glue("# {project_name()} (development version)")
	if (development_title == news[[1]]) {
	news[[1]] <- title
	ui_bullets(c("v" = "Replacing development heading in {.path NEWS.md}."))
	return(write_utf8(news_path, news))
	}

skip leading whitespace / empty lines?