chore: bump the pip_dependencies group with 4 updates

Bumps the pip_dependencies group with 4 updates: [cosl](https://github.com/canonical/cos-lib), [coverage[toml]](https://github.com/nedbat/coveragepy), [pyright](https://github.com/RobertCraigie/pyright-python) and [ruff](https://github.com/astral-sh/ruff).


Updates `cosl` from 0.0.42 to 0.0.43
- [Release notes](https://github.com/canonical/cos-lib/releases)
- [Commits](canonical/cos-lib@0.0.42...0.0.43)

Updates `coverage[toml]` from 7.6.4 to 7.6.7
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.4...7.6.7)

Updates `pyright` from 1.1.388 to 1.1.389
- [Release notes](https://github.com/RobertCraigie/pyright-python/releases)
- [Commits](RobertCraigie/pyright-python@v1.1.388...v1.1.389)

Updates `ruff` from 0.7.3 to 0.7.4
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.7.3...0.7.4)

---
updated-dependencies:
- dependency-name: cosl
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip_dependencies
- dependency-name: coverage[toml]
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip_dependencies
- dependency-name: pyright
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip_dependencies
- dependency-name: ruff
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip_dependencies
...

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

requirements.txt

@@ -26,7 +26,7 @@ charset-normalizer==3.3.2
     # via requests
 click==8.1.7
     # via typer
-cosl==0.0.42
+cosl==0.0.43
     # via -r requirements.in
 cryptography==43.0.1
     # via paramiko

test-requirements.txt

@@ -26,7 +26,7 @@ click==8.1.7
     # via typer
 codespell==2.3.0
     # via -r test-requirements.in
-coverage[toml]==7.6.4
+coverage[toml]==7.6.7
     # via -r test-requirements.in
 cryptography==43.0.1
     # via paramiko
@@ -130,7 +130,7 @@ pyrfc3339==1.1
     # via
     #   juju
     #   macaroonbakery
-pyright==1.1.388
+pyright==1.1.389
     # via -r test-requirements.in
 pytest==8.3.3
     # via
@@ -167,7 +167,7 @@ requests-oauthlib==2.0.0
     # via kubernetes
 rsa==4.9
     # via google-auth
-ruff==0.7.3
+ruff==0.7.4
     # via -r test-requirements.in
 six==1.16.0
     # via