Update argument parser tag for 5.5 to 0.4.3

Author: shahmishal

utils/update_checkout/update-checkout-config.json

@@ -105,7 +105,7 @@
                 "llbuild": "release/5.5",
                 "swift-tools-support-core": "release/5.5",
                 "swiftpm": "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",