Fix php deprecation from logs

Author: jaugustin

src/DTO/Bandit/Bandit.php

@@ -32,7 +32,7 @@ public static function fromArray(array $arr): Bandit
         } catch (\Exception $e) {
             syslog(
                 LOG_WARNING,
-                "[Eppo SDK] invalid timestamp for bandit model ${arr['updatedAt']}: " . $e->getMessage()
+                "[Eppo SDK] invalid timestamp for bandit model {$arr['updatedAt']}: " . $e->getMessage()
             );
             $updatedAt = new DateTime();
         } finally {

src/EppoClient.php

@@ -359,7 +359,7 @@ private function getAssignmentDetail(
         $flag = $config->getFlag($flagKey);
 
         if (!$flag) {
-            syslog(LOG_WARNING, "[EPPO SDK] No assigned variation; flag not found ${flagKey}");
+            syslog(LOG_WARNING, "[EPPO SDK] No assigned variation; flag not found {$flagKey}");
             return null;
         }
 
@@ -376,7 +376,7 @@ private function getAssignmentDetail(
         ) {
             $actualType = gettype($computedVariation->value);
             $eVarType = $expectedVariationType->value;
-            syslog(LOG_ERR, "[EPPO SDK] Variation does not have the expected type, ${eVarType}; found ${actualType}");
+            syslog(LOG_ERR, "[EPPO SDK] Variation does not have the expected type, {$eVarType}; found {$actualType}");
             return null;
         }