Update citation for newest release (#1367)

Author: HenrZu

CITATION.cff

@@ -1,8 +1,8 @@
 cff-version: "1.2.0"
 message: "If you use this software, please cite it using the metadata below."
-title: "MEmilio v2.0.0 - A high performance Modular EpideMIcs simuLatIOn software"
-version: "2.0.0"
-date-released: "2025-04"
+title: "MEmilio v2.1.0 - A high performance Modular EpideMIcs simuLatIOn software"
+version: "2.1.0"
+date-released: "2025-08"
 authors:
   - given-names: "Julia"
     family-names: "Bicker"
@@ -12,7 +12,7 @@ authors:
     family-names: "Korf"
   - given-names: "Lena"
     family-names: "Plötzke"
-  - given-names: "Rene"
+  - given-names: "René"
     family-names: "Schmieding"
   - given-names: "Anna Clara"
     family-names: "Wendler"
@@ -36,10 +36,12 @@ authors:
     family-names: "Volmer"
   - given-names: "Nils"
     family-names: "Waßmuth"
-  - given-names: "Daniel"
-    family-names: "Richter"
   - given-names: "Hannah"
     family-names: "Tritzschak"
+  - given-names: "Daniel"
+    family-names: "Richter"
+  - given-names: "Manuel"
+    family-names: "Heger"
   - given-names: "Achim"
     family-names: "Basermann"
   - given-names: "Michael"