Ruby: Update .gitignore for moved extractor

hmac · hmac · commit a7e276343eef · 2023-03-14T12:03:03.000+13:00
diff --git a/ruby/.gitignore b/ruby/.gitignore
@@ -1,4 +1,4 @@
-/target
+extractor/target
 extractor-pack
 .vscode/launch.json
 .cache
