[renovate] Update module github.com/openconfig/ygot to v0.29.21

See merge request !1221

Co-authored-by: Renovate Bot <renovate@danet.fbi.h-da.de>

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/openconfig/gnmi v0.13.0
 	github.com/openconfig/goyang v1.6.0
-	github.com/openconfig/ygot v0.29.20
+	github.com/openconfig/ygot v0.29.21
 	github.com/prometheus/client_golang v1.20.5
 	github.com/pterm/pterm v0.12.80
 	github.com/sethvargo/go-password v0.3.1

go.sum

@@ -314,6 +314,8 @@ github.com/openconfig/grpctunnel v0.0.0-20220819142823-6f5422b8ca70/go.mod h1:Om
 github.com/openconfig/ygot v0.6.0/go.mod h1:o30svNf7O0xK+R35tlx95odkDmZWS9JyWWQSmIhqwAs=
 github.com/openconfig/ygot v0.29.20 h1:XHLpwCN91QuKc2LAvnEqtCmH8OuxgLlErDhrdl2mJw8=
 github.com/openconfig/ygot v0.29.20/go.mod h1:K8HbrPm/v8/emtGQ9+RsJXx6UPKC5JzS/FqK7pN+tMo=
+github.com/openconfig/ygot v0.29.21 h1:nTkrS+Vln8fxVhoC6jpDCvvXyrupHR9OcM0rFQVFrz4=
+github.com/openconfig/ygot v0.29.21/go.mod h1:bIAcIvtjCq6tC90UMTJppUPAxIqyQc+vxZ6oS2Mg6ag=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQb2IpWsCzug=