Update speakers

* translate german bios to english
* add missing mastodon handle
* check abstract from Juliette

Author: rabbl

_data/speakers.yml

@@ -12,9 +12,9 @@ speakers:
     talk:
       title: 'Resurrecting the dead'
       abstract: |
-        Have you ever considered what would happen when a popular open source package is abandoned ?
-        Now, what about when that package is one of your essential dependencies ?
-
+        Have you ever considered what would happen when a popular open source package is abandoned?
+        Now, what about when that package is one of your essential dependencies?
+        
         This scenario is not some abstract scenario for a far away future. Projects get abandoned every day and your dependency might be next... But you can help!
         Come & listen to some tales of an accidental maintainer and learn about what you can do to help try and prevent these situations from getting out of hand.
     social:
@@ -39,8 +39,7 @@ speakers:
       - icon: 'twitter'
         url: 'https://twitter.com/OndrejMirtes'
       - icon: 'mastodon'
-        url: 'https://phpc.social/@
-    
+        url: 'https://phpc.social/@OndrejMirtes'
 
   - name: 'Sebastian Feldmann'
     bio: |
@@ -64,13 +63,14 @@ speakers:
 
   - name: 'Sebastian Kurfürst'
     bio: |
-      Sebastian ist leidenschaftlicher Software-Architekt & Coach, und seit über 20 Jahren in Open Source Projekten involviert. 
+      Sebastian is a passionate software architect & coach, and has been involved in open source projects for over 20 years. 
       
-      Nachdem er im TYPO3 Kernteam war, ist er seit über 13 Jahren mitverantwortlich für Neos CMS. Sebastian hat hier viele Teile maßgeblich mit gestaltet, u.a. die React-UI, und die Rendering-Schicht mit Fluid und Fusion. 
+      After being part of the TYPO3 core team, he has been co-responsible for Neos CMS for over 13 years. Sebastian has been instrumental in shaping many parts of it, including the React UI, and the rendering layer with Fluid and Fusion. 
       
-      Momentan fokussiert er sich auf einen Umbau des Neos Content Repository auf Basis von Event Sourcing.
+      He is currently focussing on rebuilding the Neos content repository on the basis of event sourcing.
       
-      Sebastian ist Mitgründer und Geschäftsführer von Sandstorm Media, einer Dresdner Web-Agentur mit Fokus auf nachhaltige Software. In seiner Freizeit geht er gern Klettern und verbringt Zeit mit seiner Familie.
+      Sebastian is co-founder and managing director of Sandstorm Media, a Dresden-based web agency focussing on sustainable software. In his spare time, he enjoys climbing and spending time with his family.
+
     image: '/assets/images/speakers/Sebastian-Kurfuerst.jpg'
     talk:
       title: 'How to write unmaintainable code'
@@ -112,7 +112,7 @@ speakers:
 
   - name: 'Anne-Julia Seitz'
     bio: |
-        TBA
+      TBA
     image: 'https://placehold.co/512x512?text=🤫'
     talk:
       title: 'Running PHP-Applications in a Multi-Process Container'
@@ -136,17 +136,17 @@ speakers:
 
   - name: 'Carsten Windler'
     bio: |
-      Carsten ist langjähriger PHP-Entwickler und seit PHP 3 seiner Lieblingssprache treu. Im Laufe der Jahre leitete er zudem mehrere Entwicklungsteams und -abteilungen. Sein Fokus gilt der Codequalität und der Umweltverträglichkeit von Software.
+      Carsten has been a PHP developer for many years and has been loyal to his favourite language since PHP 3. Over the years, he has also led several development teams and departments. His focus is on code quality and the environmental compatibility of software.
 
-      Derzeit arbeitet er als Principal Engineer bei Plan A in Berlin, wo er das Schreiben von Code mit der Leidenschaft, den Klimawandel zu bekämpfen, verbinden kann. Er ist Co-Autor des Buches "Clean Code in PHP", das im Oktober 2022 im Packt-Verlag erschien. Außerdem schreibt er regelmäßig Artikel für Fachpublikationen wie das PHP Magazin und ist aktiver Sprecher auf Entwickler-Konferenzen.
+      He currently works as a Principal Engineer at Plan A in Berlin, where he can combine writing code with a passion for fighting climate change. He is co-author of the book "Clean Code in PHP", which was published by Packt-Verlag in October 2022. He also regularly writes articles for specialist publications such as PHP Magazin and is an active speaker at developer conferences.
     image: '/assets/images/speakers/Carsten_Windler.jpg'
     talk:
       title: 'How to build sustainable web applications'
       abstract: |
         Software that is built with sustainability in mind not only has a lower carbon footprint, but it is usually more performant, cheaper to operate and robust. Quite some benefits you won't miss for sure.
-  
+        
         But where to start? How do we even measure the emissions of software? And how can we possibly reduce them?
-  
+        
         In this talk, we'll explore the latest tools and methodologies that help us to write software which not only makes your users happier, but also stresses the environment a little less.
     social:
       - icon: 'linkedin'