[llvm] Update security group affiliation (PR #141027)

[Pietro Albini via llvm-commits]

https://github.com/pietroalbini created https://github.com/llvm/llvm-project/pull/141027

I recently left Ferrous Systems, updating my affiliation to "individual".

>From f16d30ba6c1af654838dbe13fe136658db162af3 Mon Sep 17 00:00:00 2001
From: Pietro Albini <pietro at pietroalbini.org>
Date: Thu, 22 May 2025 11:36:47 +0200
Subject: [PATCH] update security group affiliation

---
 llvm/docs/Security.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/docs/Security.rst b/llvm/docs/Security.rst
index 8f04b6594de79..5383027b2dfd1 100644
--- a/llvm/docs/Security.rst
+++ b/llvm/docs/Security.rst
@@ -51,7 +51,7 @@ username for an individual isn't available, the brackets will be empty.
 * Nikhil Gupta (Nvidia) []
 * Oliver Hunt (Apple) [@ojhunt]
 * Peter Smith (ARM) [@smithp35]
-* Pietro Albini (Ferrous Systems; Rust) [@pietroalbini]
+* Pietro Albini (individual; Rust) [@pietroalbini]
 * Serge Guelton (Mozilla) [@serge-sans-paille]
 * Sergey Zverev (Intel) [@offsake]
 * Shayne Hiet-Block (Microsoft) [@GreatKeeper]