Bump regex from 1.7.2 to 1.7.3 in /ql

Bumps [regex](https://github.com/rust-lang/regex) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.7.2...1.7.3)

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

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

Author: dependabot[bot]

ql/Cargo.lock

@@ -9,4 +9,4 @@ edition = "2018"
 lazy_static = "1.4.0"
 chrono = "0.4.24"
 rayon = "1.7.0"
-regex = "1.7.2"
+regex = "1.7.3"

ql/buramu/Cargo.toml

@@ -17,5 +17,5 @@ clap = "2.33"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }
 rayon = "1.7.0"
-regex = "1.7.2"
+regex = "1.7.3"
 codeql-extractor = { path = "../../shared/tree-sitter-extractor" }