Bump swift-argument-parser version for 5.5 branch

Author: MaxDesiatov

utils/update_checkout/update-checkout-config.json

@@ -116,7 +116,7 @@
                  "llbuild": "release/5.5",
                  "swift-tools-support-core": "release/5.5",
                  "swiftpm": "swiftwasm-release/5.5",
-                 "swift-argument-parser": "0.4.1",
+                 "swift-argument-parser": "0.4.3",
                  "swift-crypto": "1.1.5",
                  "swift-driver": "release/5.5",
                  "swift-syntax": "release/5.5",