internal/history: document Go 1.18.3 and Go 1.17.11

For golang/go#53184.
For golang/go#53185.

Change-Id: I4317c6de34024fa7a895b511f51b0c2d9002e666
Reviewed-on: https://go-review.googlesource.com/c/website/+/409734
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Alex Rakoczy <alex@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/internal/history/release.go b/internal/history/release.go
index ae101a4..4fb7aa7 100644
--- a/internal/history/release.go
+++ b/internal/history/release.go
@@ -15,6 +15,25 @@
 // The table is sorted by date, breaking ties with newer versions first.
 var Releases = []*Release{
 	{
+		Date: Date{2022, 6, 1}, Version: Version{1, 18, 3},
+		Security: &FixSummary{
+			Packages: []string{"crypto/rand", "crypto/tls", "os/exec", "path/filepath"},
+		},
+		Bug: &FixSummary{
+			Components: []template.HTML{"the compiler"},
+			Packages:   []string{"crypto/tls", "text/template/parse"},
+		},
+	},
+	{
+		Date: Date{2022, 6, 1}, Version: Version{1, 17, 11},
+		Security: &FixSummary{
+			Packages: []string{"crypto/rand", "crypto/tls", "os/exec", "path/filepath"},
+		},
+		Bug: &FixSummary{
+			Packages: []string{"crypto/tls"},
+		},
+	},
+	{
 		Date: Date{2022, 5, 10}, Version: Version{1, 18, 2},
 		Security: &FixSummary{
 			Packages: []string{"syscall"},