docs: fix the DocumentTranslationError comment and a strict-mode README example

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: hive-bot

README.md

@@ -792,11 +792,11 @@ const fetched = await deeplClient.getStyleRuleCustomInstruction(rule, instructio
 
 // Update a custom instruction
 const updated = await deeplClient.updateStyleRuleCustomInstruction(
-    'YOUR_STYLE_ID', instruction.id, 'Updated label', 'Use very formal language');
+    'YOUR_STYLE_ID', instruction, 'Updated label', 'Use very formal language');
 
 // Delete a custom instruction
 await deeplClient.deleteStyleRuleCustomInstruction(
-    'YOUR_STYLE_ID', instruction.id);
+    'YOUR_STYLE_ID', instruction);
 ```
 
 #### Deleting a style rule

src/errors.ts

@@ -38,8 +38,10 @@ export class ConnectionError extends DeepLError {
 }
 
 /**
- * Thrown by translateDocument() for any failure except a missing input file. The cause is in
- * `error`; `httpStatusCode` and `shouldRetry` are copied from it when it is a DeepLError.
+ * Thrown by translateDocument() for any failure, including a missing input file, except an
+ * existing or unwritable output path (the Node error) and a failed minification
+ * (DocumentMinificationError). The cause is in `error`; `httpStatusCode` and `shouldRetry` are
+ * copied from it when it is a DeepLError.
  */
 export class DocumentTranslationError extends DeepLError {
     public readonly documentHandle?: DocumentHandle;