internal/history: document Go 1.26.4 and 1.25.11 releases

Change-Id: Ic313aa53875b0ddbb5d7c7df4f80d387f637fd22
Reviewed-on: https://go-review.googlesource.com/c/website/+/786180
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

internal/history/release.go

diff --git a/internal/history/release.go b/internal/history/release.go
index e9875c4..9926d42 100644
--- a/internal/history/release.go
+++ b/internal/history/release.go
@@ -14,6 +14,42 @@
 // The table is sorted by date, breaking ties with newer versions first.
 var Releases = []*Release{
 	{
+		Date: Date{2026, 6, 2}, Version: Version{1, 26, 4},
+		Security: &FixSummary{
+			Packages: []string{
+				"crypto/x509",
+				"mime",
+				"net/textproto",
+			},
+		},
+		Bug: &FixSummary{
+			Components: []template.HTML{
+				"the compiler",
+				"the runtime",
+				"the <code>go fix</code> command",
+			},
+			Packages: []string{
+				"crypto/fips140",
+			},
+		},
+	},
+	{
+		Date: Date{2026, 6, 2}, Version: Version{1, 25, 11},
+		Security: &FixSummary{
+			Packages: []string{
+				"crypto/x509",
+				"mime",
+				"net/textproto",
+			},
+		},
+		Bug: &FixSummary{
+			Components: []template.HTML{
+				"the compiler",
+				"the runtime",
+			},
+		},
+	},
+	{
 		Date: Date{2026, 5, 7}, Version: Version{1, 26, 3},
 		Security: &FixSummary{
 			Components: []template.HTML{