Update module gotest.tools/gotestsum to v1.12.3

Author: renovate[bot]

internal/tools/go.mod

@@ -21,7 +21,7 @@ require (
 	go.uber.org/goleak v1.3.0
 	golang.org/x/tools v0.26.0
 	golang.org/x/vuln v1.1.3
-	gotest.tools/gotestsum v1.12.0
+	gotest.tools/gotestsum v1.12.3
 	mvdan.cc/gofumpt v0.6.0
 )