build(deps): bump vlucas/phpdotenv from 5.6.0 to 5.6.3

Bumps [vlucas/phpdotenv](https://github.com/vlucas/phpdotenv) from 5.6.0 to 5.6.3.
- [Release notes](https://github.com/vlucas/phpdotenv/releases)
- [Commits](vlucas/phpdotenv@v5.6.0...v5.6.3)

---
updated-dependencies:
- dependency-name: vlucas/phpdotenv
  dependency-version: 5.6.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

composer.json

@@ -103,7 +103,7 @@
         "twig/extra-bundle": "3.8.0",
         "twig/intl-extra": "^3.3",
         "twig/twig": "3.8.0",
-        "vlucas/phpdotenv": "v5.6.0"
+        "vlucas/phpdotenv": "v5.6.3"
     },
     "require-dev": {
         "captbaritone/mailcatcher-codeception-module": "^3.0",