Flex: Use str_replace() and not strtr()

CHANGELOG.md

@@ -8,7 +8,7 @@
     * Added meta support for `UploadedFile` class
     * Added support for multiple mime-types per file extension [#3422](https://github.com/getgrav/grav/issues/3422)
     * Added `setCurrent()` method to Page Collection [#3398](https://github.com/getgrav/grav/pull/3398)
-    * Initialize `$grav['uri]` before session
+    * Initialize `$grav['uri']` before session
 3. [](#bugfix)
     * Fixed `Warning: Undefined array key "SERVER_SOFTWARE" in index.php` [#3408](https://github.com/getgrav/grav/issues/3408)
     * Fixed error in `loadDirectoryConfig()` if configuration hasn't been saved [#3409](https://github.com/getgrav/grav/issues/3409)

system/src/Grav/Framework/Flex/FlexDirectory.php

@@ -239,7 +239,7 @@ class FlexDirectory implements FlexDirectoryInterface
 
         // If configuration is found in main configuration, use it.
         if (str_starts_with($uri, 'config://')) {
-            $path = strtr(substr($uri, 9,  -5), '/', '.');
+            $path = str_replace('/', '.', substr($uri, 9, -5));
 
             return (array)$grav['config']->get($path);
         }