docs/sp_SP: Add translation of process/handling-regressions

Translate Documentation/process/handling-regressions.rst into Spanish.
Co-developed-by: Sergio Gonzalez <sergio.collado@gmail.com>
Signed-off-by: Sergio Gonzalez <sergio.collado@gmail.com>
Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20231031151325.2903088-1-carlos.bilbao@amd.com>

Documentation/translations/sp_SP/process/index.rst

@@ -24,3 +24,4 @@
    contribution-maturity-model
    security-bugs
    embargoed-hardware-issues
+   handling-regressions