Bump league/csv from 9.7.2 to 9.7.3

Bumps [league/csv](https://github.com/thephpleague/csv) from 9.7.2 to 9.7.3.
- [Release notes](https://github.com/thephpleague/csv/releases)
- [Changelog](https://github.com/thephpleague/csv/blob/master/CHANGELOG.md)
- [Commits](https://github.com/thephpleague/csv/compare/9.7.2...9.7.3)

---
updated-dependencies:
- dependency-name: league/csv
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

composer.json

@@ -99,7 +99,7 @@
     "laravel/ui": "^3.3",
     "laravelcollective/html": "6.*",
     "league/commonmark": "2.*",
-    "league/csv": "^9.6",
+    "league/csv": "^9.7",
     "league/fractal": "0.*",
     "pragmarx/google2fa": "^8.0",
     "predis/predis": "^1.1",