Update dependency envsubst to v1.4.3

Author: renovate[bot]

devbox.json

@@ -5,7 +5,7 @@
     "crossplane-cli@1.18.2",
     "kyverno-chainsaw@0.2.12",
     "go-task@3.41.0",
-    "envsubst@1.4.2",
+    "envsubst@1.4.3",
     "mongosh@2.3.7",
     "nushell@0.101.0"
   ],