Update paragonie/constant_time_encoding requirement || ^3.0

Updates the requirements on [paragonie/constant_time_encoding](https://github.com/paragonie/constant_time_encoding) to permit the latest version.
- [Release notes](https://github.com/paragonie/constant_time_encoding/releases)
- [Commits](paragonie/constant_time_encoding@v2.0.0...v3.0.0)

---
updated-dependencies:
- dependency-name: paragonie/constant_time_encoding
  dependency-type: direct:production
...

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

composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=8.1",
         "ext-mbstring": "*",
-        "paragonie/constant_time_encoding": "^2.0",
+        "paragonie/constant_time_encoding": "^2.0 || ^3.0",
         "psr/clock": "^1.0",
         "symfony/deprecation-contracts": "^3.2"
     },