internal/history: document Go 1.27.3 and Go 1.26.10

Change-Id: I2b8d44f44b19dfcf1155ba45a3bccb4d88d50689
Reviewed-on: https://go-review.googlesource.com/c/website/+/851046
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: David Chase <drchase@google.com>
Reviewed-by: Neal Patel <nealpatel@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

internal/history/release.go

diff --git a/internal/history/release.go b/internal/history/release.go
index 22869b2..27bd7ef 100644
--- a/internal/history/release.go
+++ b/internal/history/release.go
@@ -14,6 +14,18 @@
 // The table is sorted by date, breaking ties with newer versions first.
 var Releases = []*Release{
 	{
+		Date: Date{2026, 10, 19}, Version: Version{1, 27, 3},
+		Security: &FixSummary{
+			Packages: []string{"crypto/x509"},
+		},
+	},
+	{
+		Date: Date{2026, 10, 19}, Version: Version{1, 26, 10},
+		Security: &FixSummary{
+			Packages: []string{"crypto/x509"},
+		},
+	},
+	{
 		Date: Date{2026, 10, 8}, Version: Version{1, 27, 2},
 		Security: &FixSummary{
 			Components: []template.HTML{"the <code>go</code> command"},