mbedtls@2: move deprecation date 3 months out

Signed-off-by: Patrick Linnane <[email protected]>

Author: p-linnane

Formula/m/[email protected]

@@ -26,7 +26,7 @@ class MbedtlsAT2 < Formula
 
   # mbedtls-2.28 maintained until the end of 2024
   # Ref: https://github.com/Mbed-TLS/mbedtls/blob/development/BRANCHES.md#current-branches
-  deprecate! date: "2024-12-31", because: :unsupported
+  deprecate! date: "2025-03-31", because: :unsupported
 
   depends_on "cmake" => :build
   depends_on "[email protected]" => :build