Forgot to document firebirdsql/firebird in javadoc

Author: mrotteveel

src/main/java/org/firebirdsql/testcontainers/FirebirdContainer.java

@@ -12,7 +12,7 @@
 /**
  * Testcontainers implementation for Firebird.
  * <p>
- * Supported image: {@code jacobalberty/firebird}, {@code ghcr.io/fdcastel/firebird}.
+ * Supported image: {@code jacobalberty/firebird}, {@code firebirdsql/firebird}, {@code ghcr.io/fdcastel/firebird}.
  * <p>
  * Exposed ports: 3050
  */