fix(deps): update dependency @smithy/signature-v4 to ^5.4.3

Author: renovate[bot]

package-lock.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@aws-crypto/sha256-js": "^5.2.0",
     "@smithy/protocol-http": "^5.4.3",
-    "@smithy/signature-v4": "^5.4.2",
+    "@smithy/signature-v4": "^5.4.3",
     "@smithy/types": "^4.14.1"
   },
   "devDependencies": {