data/reports: add vulnerable_at for GO-2022-0433 and GO-2022-0434

Change-Id: Icea2d1b82309992a3e70073e05347f36860bbaac
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/463679
Reviewed-by: Tim King <taking@google.com>
Auto-Submit: Tatiana Bradley <tatianabradley@google.com>
Run-TryBot: Tatiana Bradley <tatianabradley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
diff --git a/data/reports/GO-2022-0433.yaml b/data/reports/GO-2022-0433.yaml
index eb35be6..7fbe770 100644
--- a/data/reports/GO-2022-0433.yaml
+++ b/data/reports/GO-2022-0433.yaml
@@ -4,6 +4,7 @@
       - fixed: 1.17.9
       - introduced: 1.18.0
         fixed: 1.18.1
+    vulnerable_at: 1.18.0
     packages:
       - package: encoding/pem
         symbols:
diff --git a/data/reports/GO-2022-0434.yaml b/data/reports/GO-2022-0434.yaml
index fcd5e32..f4ae41c 100644
--- a/data/reports/GO-2022-0434.yaml
+++ b/data/reports/GO-2022-0434.yaml
@@ -3,6 +3,7 @@
     versions:
       - introduced: 1.18.0
         fixed: 1.18.1
+    vulnerable_at: 1.18.0
     packages:
       - package: crypto/x509
         goos: