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 <[email protected]>
 Anton Haumer <[email protected]>
 Antonio Froio <[email protected]>
+Arunkumar Narasimhan <[email protected]>
+Arunkumar Narasimhan <[email protected]>
 Bernhard Thiele <[email protected]>
 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 <[email protected]>
 Leo Zambito <[email protected]>
+Luigi Vanfretti <[email protected]>
 Malte Lenz <[email protected]>
+Manikantan Thiyagarajan <[email protected]>
 Marco Kessler <[email protected]>
 Marcus Baur <baur_ma@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Martin Otter <[email protected]>
@@ -95,6 +99,8 @@ Per Östlund <[email protected]>
 Peter Harman <[email protected]>
 Peter Harman <pharman@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Philip Jordan <pjordan@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
+Quentin Lambert <[email protected]>
+Rüdiger Franke <[email protected]>
 Rüdiger Franke <rfranke@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Stefan Vorkoetter <[email protected]>
 Stefan Wischhusen <wischhusen@7ce873d0-865f-4ce7-a662-4bb36ea78beb>