add a new SCT vector (#4528)

* add a new SCT vector

* ridiculous
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index e512a90..d68e1e9 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -161,6 +161,8 @@
   ``cryptography.io.pem`` certificate.
 * ``cryptography.io.precert.pem`` - A pre-certificate with the CT poison
   extension for the cryptography website.
+* ``cryptography-scts.io.pem`` - A leaf certificate issued by Let's Encrypt for
+  the cryptography website which contains signed certificate timestamps.
 * ``wildcard_san.pem`` - A leaf certificate issued by a public CA for
   ``langui.sh`` that contains wildcard entries in the SAN extension.
 * ``san_edipartyname.der`` - A DSA certificate from a `Mozilla bug`_
diff --git a/docs/spelling_wordlist.txt b/docs/spelling_wordlist.txt
index ed18924..4614421 100644
--- a/docs/spelling_wordlist.txt
+++ b/docs/spelling_wordlist.txt
@@ -95,6 +95,7 @@
 Tanja
 testability
 timestamp
+timestamps
 tunable
 Ubuntu
 unencrypted
diff --git a/vectors/cryptography_vectors/x509/cryptography-scts.pem b/vectors/cryptography_vectors/x509/cryptography-scts.pem
new file mode 100644
index 0000000..77f0b56
--- /dev/null
+++ b/vectors/cryptography_vectors/x509/cryptography-scts.pem
@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----
+MIIGCzCCBPOgAwIBAgISA9MzcqjnMT3tsDXK3Lry4uRIMA0GCSqGSIb3DQEBCwUA
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+DJbhFMA/rdWmsV8a/ZiD
+-----END CERTIFICATE-----