Add September 2025 meeting and August recording link

Added the upcoming meeting for September 17, 2025 with notes link, and included a recording link for the August 20, 2025 meeting.

Author: JR-1991

index.md

@@ -81,7 +81,8 @@ We welcome anyone to join our meetings! We meet every 3rd Wednesday at 2:00PM UT
 
 The WebEx link is <https://unistuttgart.webex.com/unistuttgart/j.php?MTID=m322473ae7c744792437ce854422e52a3>
 
-- [2025-08-20, 14:00 UTC](https://time.is/compare/1400_20_Aug_2025_in_UTC) - [Notes](https://docs.google.com/document/d/1yyN300Bcmtp2BvaVenbiJ4YjH2YPgMYDLjEk8Usp2UE/edit?usp=sharing)
+- [2025-09-17, 14:00 UTC](https://time.is/compare/1400_17_Sep_2025_in_UTC) - [Notes](https://docs.google.com/document/d/1Dj46LroQWQY4pgm4h-Hj7aRkmB-olE1DZ_KJ6fBfLjQ/edit?usp=sharing)
+- [2025-08-20, 14:00 UTC](https://time.is/compare/1400_20_Aug_2025_in_UTC) - [Notes](https://docs.google.com/document/d/1yyN300Bcmtp2BvaVenbiJ4YjH2YPgMYDLjEk8Usp2UE/edit?usp=sharing) [Recording](https://drive.google.com/file/d/1LEG09m9cAGttGWJNEEIqfbiJARE0KK3g/view?usp=share_link)
 - [2025-06-18, 14:00 UTC](https://time.is/compare/1400_18_Jun_2025_in_UTC) - [Notes](https://docs.google.com/document/d/1jN8Q7d9ugwShW0CNUea7RVvRXEij3O5DYCt7RDD4mck/edit?usp=sharing) [Recording](https://drive.google.com/file/d/17ISo_HmtJydLZUj6151_yZN9HVf_QeRf/view?usp=share_link)
 - [2025-06-10, 14:00 GMT-4](https://time.is/compare/1400_10_Jun_2025_in_GMT-4) (DCM '25 hybrid) - [Notes](https://docs.google.com/document/d/1uSp7hboLrDG7wvzzEFlgTTYZX_I6UC4WPepxwKDJMR4/edit?usp=sharing)
 - [2025-05-21, 14:00 UTC](https://time.is/compare/1400_21_May_2025_in_UTC) - [Notes](https://docs.google.com/document/d/1iFH9GTFLLbTZHv3a9P36eWQ07uywhMn9IPsL3reANJA/edit?usp=sharing) [Recording](https://drive.google.com/file/d/1CG0QdlRmXFFsGX-vkLoVjeQeEfsRitij/view?usp=share_link)