Bump regex from 1.5.5 to 1.5.6

Bumps [regex](https://github.com/rust-lang/regex) from 1.5.5 to 1.5.6.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.5.5...1.5.6)

---
updated-dependencies:
- dependency-name: regex
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -38,7 +38,7 @@ crossbeam = "0.8"
 rand = "0.8.5"
 serde-pickle = { version = "1.1.1", optional = true }
 parking_lot = "0.12.0"
-regex = { version = "1.5.5" }
+regex = { version = "1.5.6" }
 rust-ini = "0.18.0"
 sbp = { version = "4.2.0", features = ["json", "link", "swiftnav"] }
 sbp-settings = "0.6.9"