internal/history: document Go 1.22.2 and 1.21.9 releases

Change-Id: I6f8a3ffecebb7a50798d03fc0693d42dc5ad791f
Reviewed-on: https://go-review.googlesource.com/c/website/+/576056
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
diff --git a/internal/history/release.go b/internal/history/release.go
index 0ae0d56..2850256 100644
--- a/internal/history/release.go
+++ b/internal/history/release.go
@@ -15,6 +15,22 @@
 // The table is sorted by date, breaking ties with newer versions first.
 var Releases = []*Release{
 	{
+		Date: Date{2024, 4, 3}, Version: Version{1, 22, 2},
+		Security: &FixSummary{Quantifier: "a", Packages: []string{"net/http"}},
+		Bug: &FixSummary{
+			Components: []template.HTML{"the compiler", "the <code>go</code> command", "the linker"},
+			Packages:   []string{"encoding/gob", "go/types", "net/http", "runtime/trace"},
+		},
+	},
+	{
+		Date: Date{2024, 4, 3}, Version: Version{1, 21, 9},
+		Security: &FixSummary{Quantifier: "a", Packages: []string{"net/http"}},
+		Bug: &FixSummary{
+			Components: []template.HTML{"the linker"},
+			Packages:   []string{"go/types", "net/http"},
+		},
+	},
+	{
 		Date: Date{2024, 3, 5}, Version: Version{1, 22, 1},
 		Security: &FixSummary{
 			Packages: []string{"crypto/x509", "html/template", "net/http", "net/http/cookiejar", "net/mail"},