chore(deps): bump connectrpc.com/vanguard from 0.2.0 to 0.3.0

Bumps [connectrpc.com/vanguard](https://github.com/connectrpc/vanguard-go) from 0.2.0 to 0.3.0.
- [Release notes](https://github.com/connectrpc/vanguard-go/releases)
- [Commits](connectrpc/vanguard-go@v0.2.0...v0.3.0)

---
updated-dependencies:
- dependency-name: connectrpc.com/vanguard
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -5,7 +5,7 @@ go 1.21
 require (
 	connectrpc.com/connect v1.16.2
 	connectrpc.com/otelconnect v0.7.1
-	connectrpc.com/vanguard v0.2.0
+	connectrpc.com/vanguard v0.3.0
 	github.com/Masterminds/squirrel v1.5.4
 	github.com/bufbuild/httplb v0.3.0
 	github.com/go-git/go-git/v5 v5.12.0

go.sum

@@ -2,8 +2,8 @@ connectrpc.com/connect v1.16.2 h1:ybd6y+ls7GOlb7Bh5C8+ghA6SvCBajHwxssO2CGFjqE=
 connectrpc.com/connect v1.16.2/go.mod h1:n2kgwskMHXC+lVqb18wngEpF95ldBHXjZYJussz5FRc=
 connectrpc.com/otelconnect v0.7.1 h1:scO5pOb0i4yUE66CnNrHeK1x51yq0bE0ehPg6WvzXJY=
 connectrpc.com/otelconnect v0.7.1/go.mod h1:dh3bFgHBTb2bkqGCeVVOtHJreSns7uu9wwL2Tbz17ms=
-connectrpc.com/vanguard v0.2.0 h1:78xAoVKvaOeHN8PvDetlRpJQ1OImLh2jDnWPNaT9dPo=
-connectrpc.com/vanguard v0.2.0/go.mod h1:EoRa8q5sbNQua+wH5cr9NBePLFaUKIWLAjc1A8rSfDA=
+connectrpc.com/vanguard v0.3.0 h1:prUKFm8rYDwvpvnOSoqdUowPMK0tRA0pbSrQoMd6Zng=
+connectrpc.com/vanguard v0.3.0/go.mod h1:nxQ7+N6qhBiQczqGwdTw4oCqx1rDryIt20cEdECqToM=
 dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk=
 dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=