fix(nix): update vendorHash and vendor dir for new deps

vendor/github.com/bytedance/sonic/internal/envs/decode.go

@@ -0,0 +1,24 @@
+package envs
+
+import (
+	"os"
+)
+
+var UseOptDec  = os.Getenv("SONIC_USE_OPTDEC")  == "1" 
+var UseFastMap = os.Getenv("SONIC_USE_FASTMAP") == "1" 
+
+func EnableOptDec() {
+	UseOptDec = true
+}
+
+func DisableOptDec() {
+	UseOptDec = false
+}
+
+func EnableFastMap() {
+	UseFastMap = true
+}
+
+func DisableFastMap() {
+	UseFastMap = false
+}