fix(build): use published caddyadmin v0.3.0 instead of local replace

CI failed with 'replacement directory ../../caddyadmin does not exist' —
the local-path replace only exists on the dev machine. CornWorld/caddyadmin
main == local HEAD (46f4fb9) and v0.3.0 is now tagged/pushed on GitHub, so
drop the replace and let require resolve v0.3.0 from the module proxy.

go.sum gains the two v0.3.0 checksums; nothing else changed.

Author: CornWorld

vault/go.mod

@@ -2,8 +2,6 @@ module github.com/cornworld/vanblog
 
 go 1.26.5
 
-replace github.com/CornWorld/caddyadmin => ../../caddyadmin
-
 require (
 	github.com/CornWorld/caddyadmin v0.3.0
 	github.com/brianvoe/gofakeit/v7 v7.15.0

vault/go.sum

@@ -1,3 +1,5 @@
+github.com/CornWorld/caddyadmin v0.3.0 h1:SqElwci6ly0LSs4sivuRvSz9H4L/Y2YvSUxNduVeWUI=
+github.com/CornWorld/caddyadmin v0.3.0/go.mod h1:/ksrYqZqTYZxnf79qJeDHbN3h4+rBnNH6A58k+NlCRY=
 github.com/Masterminds/semver/v3 v3.5.0 h1:kQceYJfbupGfZOKZQg0kou0DgAKhzDg2NZPAwZ/2OOE=
 github.com/Masterminds/semver/v3 v3.5.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
 github.com/asaskevich/govalidator v0.0.0-20200108200545-475eaeb16496/go.mod h1:oGkLhpf+kjZl6xBf758TQhh5XrAeiJv/7FRz/2spLIg=