⬆️ update coverage[toml] requirement from ~=6.2 to ~=7.5

Updates the requirements on [coverage[toml]](https://github.com/nedbat/coveragepy) to permit the latest version.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.2...7.5.0)

---
updated-dependencies:
- dependency-name: coverage[toml]
  dependency-type: direct:production
...

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

pyproject.toml

@@ -53,7 +53,7 @@ test = [
     "inline-snapshot ~= 0.6.0",
     "async-asgi-testclient ~= 1.4.11",
     "asyncmock ~= 0.4.2",
-    "coverage[toml] ~= 6.2",
+    "coverage[toml] ~= 7.5",
     "pytz ~= 2023.3",
     "types-pytz ~= 2023.3.0.0",
     "darglint ~= 1.8.1",