Bump regex from 1.5.4 to 1.5.5

Bumps [regex](https://github.com/rust-lang/regex) from 1.5.4 to 1.5.5.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.5.4...1.5.5)

---
updated-dependencies:
- dependency-name: regex
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -12,7 +12,7 @@ tempfile = "3"
 lazy_static = "1"
 handlebars = { version = "4.1.1", features = ["dir_source"] }
 walkdir = "2"
-regex = "1.1.6"
+regex = "1.5.5"
 mailmap = { path = "./mailmap" }
 
 [profile.release]