fix: mismatch in classname for cache discovery (#6)

See #5

---------

Co-authored-by: Evan Sims <[email protected]>

Author: reyostallenberg

src/Discover.php

@@ -87,7 +87,7 @@ final class Discover implements DiscoverContract
 
     public static function cache(bool $singleton = false): ?object
     {
-        $implementationsPackage = '\PsrDiscovery\Implementations\Psr6\Cache';
+        $implementationsPackage = '\PsrDiscovery\Implementations\Psr6\Caches';
 
         if (! class_exists($implementationsPackage)) {
             throw new SupportPackageNotFoundException('PSR-6 Cache', 'psr-discovery/cache-implementations');

src/Exceptions/SupportPackageNotFoundException.php

@@ -6,6 +6,8 @@
 
 use Exception;
 
+use function sprintf;
+
 final class SupportPackageNotFoundException extends Exception
 {
     /**