Update .mailmap file

Create by command

```
git log --raw | grep "^Author: " | sort | uniq | cut -d ' ' -f2- | sed 's/^//' > .mailmap
```

as reported by https://kevin.burke.dev/kevin/easy-maintenance-of-your-authors-file/

.mailmap

@@ -13,6 +13,8 @@ Anton Haumer <ahaumer@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Anton Haumer <anton.haumer@gmail.com>
 Anton Haumer <anton.haumer@oth-regensburg.de>
 Antonio Froio <antonio.froio39@gmail.com>
+Arunkumar Narasimhan <124154466+arunkumar-narasimhan@users.noreply.github.com>
+Arunkumar Narasimhan <arunkumar.narasimhan@modelon.com>
 Bernhard Thiele <bernhard.thiele@dlr.de>
 Bernhard Thiele <thiele@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Bruno Scaglioni <bruno.scaglioni@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
@@ -69,7 +71,9 @@ Kristin Majetta <majetta@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Leo Gall <leo.gall@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Leo Gall <leo.gall@ltx.de>
 Leo Zambito <lzambito@maplesoft.com>
+Luigi Vanfretti <luigi.vanfretti@gmail.com>
 Malte Lenz <maltel@wolfram.com>
+Manikantan Thiyagarajan <124235109+TManikantan@users.noreply.github.com>
 Marco Kessler <marco.kessler@3ds.com>
 Marcus Baur <baur_ma@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Martin Otter <Martin.Otter@dlr.de>
@@ -95,6 +99,8 @@ Per Östlund <perost86@gmail.com>
 Peter Harman <peter.harman@deltatheta.com>
 Peter Harman <pharman@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Philip Jordan <pjordan@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
+Quentin Lambert <quentinl@wolfram.com>
+Rüdiger Franke <rdgfranke@gmail.com>
 Rüdiger Franke <rfranke@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Stefan Vorkoetter <svorkoetter@maplesoft.com>
 Stefan Wischhusen <wischhusen@7ce873d0-865f-4ce7-a662-4bb36ea78beb>