fix(security): update gix to 0.77 to resolve gix-date CVE (0.11.1 → 0.12.1)

gix-date 0.11.1 had a moderate CVE (non-UTF8 string creation via TimeBuf::as_str).
Bumping gix constraint from 0.76 to 0.77 pulls in gix-date 0.12.1 which fixes it.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

rhodium-standard-repositories/satellites/rsr-certifier/Cargo.lock

@@ -39,7 +39,7 @@ sha2 = "0.10"
 hex = "0.4"
 
 # Git operations
-gix = { version = "0.76", default-features = false }
+gix = { version = "0.77", default-features = false }
 
 # Logging
 tracing = "0.1"