fix typo and rephrase

Author: thomvaill

_content/doc/go1.23.md

@@ -293,8 +293,8 @@ the GODEBUG environment variable.
 The experimental post-quantum key exchange mechanism X25519Kyber768Draft00
 is now enabled by default when [`Config.CurvePreferences`](/pkg/crypto/tls#Config.CurvePreferences) is nil.
 The default can be reverted by adding `tlskyber=0` to the GODEBUG environment variable.
-This is can be useful when dealing with legacy TLS servers that do not handle large records correctly,
-causing a timeout during the handshake (bug known as [TLS post-quantum TL;DR fail](https://tldr.fail/)).
+This can be useful when dealing with buggy TLS servers that do not handle large records correctly,
+causing a timeout during the handshake (see [TLS post-quantum TL;DR fail](https://tldr.fail/)).
 
 Go 1.23 changed the behavior of [`X509KeyPair`](/pkg/crypto/tls#X509KeyPair) and [`LoadX509KeyPair`](/pkg/crypto/tls#LoadX509KeyPair)
 to populate the [`Certificate.Leaf`](/pkg/crypto/tls#Certificate.Leaf) field of the returned [`Certificate`](/pkg/crypto/tls#Certificate).

_content/doc/go1.24.md

@@ -480,8 +480,8 @@ The new post-quantum [`X25519MLKEM768`](/pkg/crypto/tls#X25519MLKEM768) key
 exchange mechanism is now supported and is enabled by default when
 [`Config.CurvePreferences`](/pkg/crypto/tls#Config.CurvePreferences) is nil.
 [GODEBUG setting](/doc/godebug) `tlsmlkem=0` reverts the default.
-This is can be useful when dealing with legacy TLS servers that do not handle large records correctly,
-causing a timeout during the handshake (bug known as [TLS post-quantum TL;DR fail](https://tldr.fail/)).
+This can be useful when dealing with buggy TLS servers that do not handle large records correctly,
+causing a timeout during the handshake (see [TLS post-quantum TL;DR fail](https://tldr.fail/)).
 
 Support for the experimental `X25519Kyber768Draft00` key exchange has been removed.