Update pkcs7 files

Signed-off-by: Pengyu Lv <pengyu.lv@arm.com>
diff --git a/tests/data_files/pkcs7-rsa-sha256-1.pem b/tests/data_files/pkcs7-rsa-sha256-1.pem
index 3795b71..deee4b2 100644
--- a/tests/data_files/pkcs7-rsa-sha256-1.pem
+++ b/tests/data_files/pkcs7-rsa-sha256-1.pem
@@ -1,48 +1,48 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 -----BEGIN PRIVATE KEY-----
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 -----END PRIVATE KEY-----