Bump version for compiler release.

RELNOTES: n/a

PiperOrigin-RevId: 788969163

Author: Closure Team

.github/piper-cut-cl.json

@@ -1,4 +1,4 @@
 {
-  "piper_cut_cl": "787801608",
-  "version_id": "v20250727"
+  "piper_cut_cl": "788653401",
+  "version_id": "v20250729"
 }