Update .mailmap file

Create by command

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

.mailmap

@@ -43,6 +43,7 @@ Hans Olsson <Hans.Olsson@3ds.com>
 Hans Olsson <HansOlsson@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Hans Olsson <HansOlsson@users.noreply.github.com>
 Hans Olsson <hansolsson@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
+Harisankar-Allimangalath <144321750+Harisankar-Allimangalath@users.noreply.github.com>
 Henrik Tidefelt <henrikt@wolfram.com>
 Hubertus Tummescheit <Hubertus@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Hubertus Tummescheit <hubertus.tummescheit@modelon.com>
@@ -100,6 +101,7 @@ 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 <ruediger.franke@de.abb.com>
 Rüdiger Franke <rdgfranke@gmail.com>
 Rüdiger Franke <rfranke@7ce873d0-865f-4ce7-a662-4bb36ea78beb>
 Stefan Vorkoetter <svorkoetter@maplesoft.com>