[VOL-5429] - update voltha-lib-go version to 7.6.6

Change-Id: Iff363d4cf9948b89d5520e101d2ac0912e3abb83
Signed-off-by: Sridhar Ravindra <sridhar.ravindra@radisys.com>
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d2d1880..bba40c6 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -137,7 +137,7 @@
 github.com/klauspost/compress/huff0
 github.com/klauspost/compress/zstd
 github.com/klauspost/compress/zstd/internal/xxhash
-# github.com/opencord/voltha-lib-go/v7 v7.6.5
+# github.com/opencord/voltha-lib-go/v7 v7.6.6
 ## explicit
 github.com/opencord/voltha-lib-go/v7/pkg/config
 github.com/opencord/voltha-lib-go/v7/pkg/db