Bump github.com/u-root/u-root from 0.11.0 to 0.12.0

Bumps [github.com/u-root/u-root](https://github.com/u-root/u-root) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/u-root/u-root/releases)
- [Changelog](https://github.com/u-root/u-root/blob/main/RELEASES)
- [Commits](u-root/u-root@v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: github.com/u-root/u-root
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -19,7 +19,7 @@ require (
 	github.com/transparency-dev/formats v0.0.0-20230914071414-5732692f1e50
 	github.com/transparency-dev/merkle v0.0.2
 	github.com/transparency-dev/serverless-log v0.0.0-20230914155322-9b6f31f76f1f
-	github.com/u-root/u-root v0.11.0
+	github.com/u-root/u-root v0.12.0
 	github.com/usbarmory/tamago v0.0.0-20221104085030-4122a878196a
 	golang.org/x/crypto v0.18.0
 	golang.org/x/mod v0.14.0
@@ -72,7 +72,7 @@ require (
 	go.opentelemetry.io/otel v1.21.0 // indirect
 	go.opentelemetry.io/otel/metric v1.21.0 // indirect
 	go.opentelemetry.io/otel/trace v1.21.0 // indirect
-	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
+	golang.org/x/exp v0.0.0-20231219180239-dc181d75b848 // indirect
 	golang.org/x/net v0.19.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
 	golang.org/x/text v0.14.0 // indirect

go.sum

@@ -176,8 +176,8 @@ github.com/transparency-dev/serverless-log v0.0.0-20230914155322-9b6f31f76f1f h1
 github.com/transparency-dev/serverless-log v0.0.0-20230914155322-9b6f31f76f1f/go.mod h1:wePHXib4JC193IyIQImP3oNXYpUZQWzKcF6BJ8bC8GY=
 github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc h1:RTUQlKzoZZVG3umWNzOYeFecQLIh+dbxXvJp1zPQJTI=
 github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc/go.mod h1:NoCfSFWosfqMqmmD7hApkirIK9ozpHjxRnRxs1l413A=
-github.com/u-root/u-root v0.11.0 h1:6gCZLOeRyevw7gbTwMj3fKxnr9+yHFlgF3N7udUVNO8=
-github.com/u-root/u-root v0.11.0/go.mod h1:DBkDtiZyONk9hzVEdB/PWI9B4TxDkElWlVTHseglrZY=
+github.com/u-root/u-root v0.12.0 h1:K0AuBFriwr0w/PGS3HawiAw89e3+MU7ks80GpghAsNs=
+github.com/u-root/u-root v0.12.0/go.mod h1:FYjTOh4IkIZHhjsd17lb8nYW6udgXdJhG1c0r6u0arI=
 github.com/usbarmory/tamago v0.0.0-20221104085030-4122a878196a h1:tgkI+WH2ueA2q2aVbhsnH/39uw9cIJh+jB8Wq9HAITY=
 github.com/usbarmory/tamago v0.0.0-20221104085030-4122a878196a/go.mod h1:0TRKk2QXwB24gVi0TgQrvu1yGyiiLDCIBE87UMAmZHE=
 github.com/vmihailenco/msgpack v4.0.4+incompatible h1:dSLoQfGFAo3F6OoNhwUmLwVgaUXK79GlxNBwueZn0xI=
@@ -207,8 +207,8 @@ golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5y
 golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
 golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
+golang.org/x/exp v0.0.0-20231219180239-dc181d75b848 h1:+iq7lrkxmFNBM7xx+Rae2W6uyPfhPeDWD+n+JgppptE=
+golang.org/x/exp v0.0.0-20231219180239-dc181d75b848/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=