chore(doc): Add Javadoc to DecompressingBodyHandlerBuilder#lenient method.

Author: nstdio

src/main/java/io/github/nstdio/http/ext/BodyHandlers.java

@@ -103,6 +103,13 @@ public DecompressingBodyHandlerBuilder failOnUnknownDirectives(boolean failOnUnk
       return this;
     }
 
+    /**
+     * Toggles both {@link #failOnUnsupportedDirectives} and {@link #failOnUnknownDirectives}.
+     *
+     * @param lenient The lenient mode.
+     *
+     * @return this for fluent chaining.
+     */
     public DecompressingBodyHandlerBuilder lenient(boolean lenient) {
       return failOnUnsupportedDirectives(!lenient)
           .failOnUnsupportedDirectives(!lenient);