chore: fixed typo

content/posts/xz-backdoor/index.en.md

@@ -13,7 +13,7 @@ The package was used as entrypoint to inject malicious code in sshd, altering th
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 {{< admonition type=tip title="Note" open=true >}}
-The situation is still ongoing, more details will emerge in the near future and I will upgrade this post accordingly.
+The situation is still ongoing, more details will emerge in the near future and I will update this post accordingly.
 {{< /admonition >}}
 
 This is probably a full fledged operation due to it's methodology and duration but I'm not the right guy to talk about OpSec and Threat Actors attributions.