fix(deps): update module github.com/buildkite/agent/v3 to v3.124.0

Author: renovate[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.25.0
 toolchain go1.26.1
 
 require (
-	github.com/buildkite/agent/v3 v3.123.1
+	github.com/buildkite/agent/v3 v3.124.0
 	github.com/kr/pretty v0.3.1
 )
 

go.sum

@@ -1151,6 +1151,8 @@ github.com/buildkite/agent/v3 v3.123.0 h1:BoSj6bRTBT510s8km2IanXw/ZurZpD6WLi76MQ
 github.com/buildkite/agent/v3 v3.123.0/go.mod h1:O0n8NcsBVBz/fvEzg5AAJUHVHip2X2jVWreGA0r3y3M=
 github.com/buildkite/agent/v3 v3.123.1 h1:n+sjTtVX65lsymS0uuX5dnaFJE1C/oC5EEmVmCfCVYk=
 github.com/buildkite/agent/v3 v3.123.1/go.mod h1:N1peawq9B4IjAiNn8jAtu4c9eE9E6uBLye8vezb/C/U=
+github.com/buildkite/agent/v3 v3.124.0 h1:WS/1lRdxU4/3wbQ08bgxy0hm4HiogaMt6n0ZDDWvo+8=
+github.com/buildkite/agent/v3 v3.124.0/go.mod h1:zh/zRigK9TiEEBe5j6gY5XAn0Vjxjy4YRf7824ylN9E=
 github.com/buildkite/bintest/v3 v3.1.1 h1:bS924OU8Ljm46DesONXzxxTBMjbliQRnPB+H4DOeUDE=
 github.com/buildkite/go-pipeline v0.4.1 h1:RZ1afSHOt5mUcTzhFab0WxKm90vvJsOUAPpfQBETgkE=
 github.com/buildkite/go-pipeline v0.4.1/go.mod h1:/8zdWlpn40HsxZql5iUbr00P8/Fm/yud9+Bqrar8S3s=