_content/doc/go1.18: move sha1 removal to unspecified future release

Change-Id: I747e2c8b42bb4ccc90979adb4fbfe76441fec389
Reviewed-on: https://go-review.googlesource.com/c/website/+/396754
Trust: Russ Cox <[email protected]>
Reviewed-by: Filippo Valsorda <[email protected]>

Author: liggitt

_content/doc/go1.18.html

@@ -732,7 +732,7 @@ <h3 id="sha1">Rejecting SHA-1 certificates</h3>
 <p>
   This can be temporarily reverted by setting the
   <code>GODEBUG=x509sha1=1</code> environment variable.
-  This option will be removed in Go 1.19.
+  This option will be removed in a future release.
 </p>
 
 <h3 id="minor_library_changes">Minor changes to the library</h3>
@@ -866,8 +866,7 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
 
     <p>
       Support for signing certificates using signature algorithms that depend on the
-      MD5 and SHA-1 hashes (<code>MD5WithRSA</code>, <code>SHA1WithRSA</code>, and
-      <code>ECDSAWithSHA1</code>) may be removed in Go 1.19.
+      MD5 hash (<code>MD5WithRSA</code>) may be removed in Go 1.19.
     </p>
   </dd>
 </dl>