chore(deps): update module github.com/kcp-dev/kcp/sdk to v0.28.3 (#33)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -166,7 +166,7 @@ require (
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/julz/importas v0.2.0 // indirect
 	github.com/karamaru-alpha/copyloopvar v1.2.1 // indirect
-	github.com/kcp-dev/kcp/sdk v0.28.1 // indirect
+	github.com/kcp-dev/kcp/sdk v0.28.3 // indirect
 	github.com/kcp-dev/logicalcluster/v3 v3.0.5 // indirect
 	github.com/kisielk/errcheck v1.9.0 // indirect
 	github.com/kkHAIKE/contextcheck v1.1.6 // indirect

go.sum

@@ -339,6 +339,7 @@ github.com/karamaru-alpha/copyloopvar v1.2.1 h1:wmZaZYIjnJ0b5UoKDjUHrikcV0zuPyyx
 github.com/karamaru-alpha/copyloopvar v1.2.1/go.mod h1:nFmMlFNlClC2BPvNaHMdkirmTJxVCY0lhxBtlfOypMM=
 github.com/kcp-dev/kcp/sdk v0.28.1 h1:bTtuHVjFRjbwFEqXTPxc1J1JP2Hc3mTYqQ2xfJsi16M=
 github.com/kcp-dev/kcp/sdk v0.28.1/go.mod h1:8oZpWxkoMu2TDpx5DgdIGDigByKHKkeqVMA4GiWneoI=
+github.com/kcp-dev/kcp/sdk v0.28.3/go.mod h1:8oZpWxkoMu2TDpx5DgdIGDigByKHKkeqVMA4GiWneoI=
 github.com/kcp-dev/logicalcluster/v3 v3.0.5 h1:JbYakokb+5Uinz09oTXomSUJVQsqfxEvU4RyHUYxHOU=
 github.com/kcp-dev/logicalcluster/v3 v3.0.5/go.mod h1:EWBUBxdr49fUB1cLMO4nOdBWmYifLbP1LfoL20KkXYY=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=