fix(locales): update Stimm GitHub link to include HTTPS

Author: EtienneLescot

locales/en.yml

@@ -57,7 +57,7 @@ exp-fractional-opensource-stimm: |
 exp-fractional-opensource-stimm-stack: |
   Stack: Voice AI, WebRTC, real‑time processing
 exp-fractional-opensource-stimm-link: |
-  github.com/stimm-ai/stimm
+  https://github.com/stimm-ai/stimm
 exp-fractional-opensource-n8n-title: |
   n8n‑as‑code
 exp-fractional-opensource-n8n: |