binman: Add missing ssl documentation

Rerun 'binman bintool-docs' to regenerate bintools.rst

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/bintools.rst b/tools/binman/bintools.rst
index c30e7eb..dd2a22b 100644
--- a/tools/binman/bintools.rst
+++ b/tools/binman/bintools.rst
@@ -155,6 +155,17 @@
 
 
 
+Bintool: openssl: openssl tool
+------------------------------
+
+This bintool supports creating new openssl certificates.
+
+It also supports fetching a binary openssl
+
+Documentation about openssl is at https://www.openssl.org/
+
+
+
 Bintool: xz: Compression/decompression using the xz algorithm
 -------------------------------------------------------------