Update github.com/containerd/imgcrypt to v2.0.0

Signed-off-by: Kirtana Ashok <kiashok@microsoft.com>

vendor/github.com/smallstep/pkcs7/internal/legacy/x509/doc.go

@@ -0,0 +1,14 @@
+/*
+Package legacyx509 is a copy of certain parts of Go's crypto/x509 package.
+It is based on Go 1.23, and has just the parts copied over required for
+parsing X509 certificates.
+
+The primary reason this copy exists is to keep support for parsing PKCS7
+messages containing Simple Certificate Enrolment Protocol (SCEP) requests
+from Windows devices. Go 1.23 made a change marking certificates with a
+critical authority key identifier as invalid, which is mandated by RFC 5280,
+but apparently Windows marks those specific certificates as such, resulting
+in those SCEP requests failing from being parsed correctly.
+*/
+
+package legacyx509