fix: extension not correctly mapped to value

Author: Aviortheking

src/main/kotlin/net/tcgdex/sdk/models/Card.kt

@@ -171,7 +171,7 @@ data class Card internal constructor(
      * @return the full card URL with the extension and quality
      */
     fun getImageUrl(quality: Quality, extension: Extension): String {
-        return "${this.image}/${quality.value}.${extension}"
+        return "${this.image}/${quality.value}.${extension.value}"
     }
 
     /**

src/main/kotlin/net/tcgdex/sdk/models/SerieResume.kt

@@ -37,7 +37,7 @@ open class SerieResume internal constructor(
         if (this.logo == null) {
             return null
         }
-        return "${this.logo}.${extension}"
+        return "${this.logo}.${extension.value}"
     }
 
     /**

src/main/kotlin/net/tcgdex/sdk/models/SetResume.kt

@@ -47,7 +47,7 @@ data class SetResume internal constructor(
         if (this.logo == null) {
             return null
         }
-        return "${this.logo}.${extension}"
+        return "${this.logo}.${extension.value}"
     }
 
     /**
@@ -71,7 +71,7 @@ data class SetResume internal constructor(
         if (this.symbol == null) {
             return null
         }
-        return "${this.symbol}.${extension}"
+        return "${this.symbol}.${extension.value}"
     }
 
     /**