[roll recipes_version.txt] roll_util: Filter out "Bug:" and "Fixed:" lines

This will keep rolls from being linked on bugs by http://go/gitwatcher.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/88461

https://pigweed.googlesource.com/infra/recipes
recipes_version.txt Rolled-Commits: 6e0ad347a87b94e..650ba73dab3632f

GitOrigin-RevId: 6d6e6c6154517456227ed340fd765b942586b2be
Change-Id: Id3310403ccad2baf905b761570dc43258a6fe991
diff --git a/recipes_version.txt b/recipes_version.txt
index 8cd48cb..2ba79b9 100644
--- a/recipes_version.txt
+++ b/recipes_version.txt
@@ -1 +1 @@
-6e0ad347a87b94e390c96c4703d41a67ee2ddc04
\ No newline at end of file
+650ba73dab3632f976b62c4c987470890721d13a
\ No newline at end of file