stdexec: Update stdexec.git (#109)

Co-authored-by: Flatpak External Data Checker <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

Flatpak/stdexec.yaml

@@ -28,5 +28,5 @@ sources:
     dest-filename: CPM.cmake
   - type: git
     url: https://github.com/NVIDIA/stdexec.git
-    commit: 15351cc98f88f615545934bea1ab8f0f7a8b135b
+    commit: 770f7959142c2446319f642c82aed8b07aea3f86
     branch: main