Fix javadoc since

Author: d0by1

src/main/java/eu/decentsoftware/holograms/api/utils/items/SkullUtils.java

@@ -227,14 +227,14 @@ public static void setSkullOwner(@NonNull ItemStack itemStack, @NonNull String o
             }
         }
     }
-    
+
     /**
      * Returns the cached Base64 value from a Player name - if actually cached - or
      * attempts to retrieve it using the provided Player name.
      *
      * @param username The player username.
      * @return The Base64 or null if the texture couldn't be obtained.
-     * @since 2.7.17
+     * @since 2.8.17
      */
     @Nullable
     public static String getCachedOrFetchFromUsername(String username) {