fix(ci): support dependabot's conventional commit messages

Author: thomasleplus

.github/workflows/automerge.yml

@@ -24,7 +24,7 @@ jobs:
           # Checking the PR title is a poor substitute for the actual PR changes
           # but as long as this is used only with dependabot PRs,
           # it should be safe to assume that the title is not misleading.
-          regexp='^Bump .* from [0-9]+\.[0-9]+(\.[0-9]+)?(\.[0-9]+)?(\-[a-z]+)? to [0-9]+\.[0-9]+(\.[0-9]+)?(\.[0-9]+)?(\-[a-z]+)?( in .*)?$'
+          regexp='[Bb]ump .* from [0-9]+\.[0-9]+(\.[0-9]+)?(\.[0-9]+)?(\-[a-z]+)? to [0-9]+\.[0-9]+(\.[0-9]+)?(\.[0-9]+)?(\-[a-z]+)?( in .*)?$'
           if ! [[ "${PR_TITLE}" =~ ${regexp} ]] ; then
             echo 'Non-semver upgrade, needs manual review.'
           elif [ "${BASH_REMATCH[3]}" != "${BASH_REMATCH[6]}" ] ; then