[VOL-5583] upgrade go to 1.25.5 and golangci-lint version to 2.8.0

Signed-off-by: madhumatigouda <madhumati.gouda@radisys.com>
Change-Id: Iab871760e36d5fb4be11ce9719352e9decc5438a
diff --git a/docker/Dockerfile.openolt b/docker/Dockerfile.openolt
index 97019d2..bd851ac 100644
--- a/docker/Dockerfile.openolt
+++ b/docker/Dockerfile.openolt
@@ -15,7 +15,7 @@
 # -------------
 # Build stage
 
-FROM golang:1.25.3-alpine3.22 AS dev
+FROM golang:1.25.5-alpine3.22 AS dev
 
 # Install required packages
 RUN apk add --no-cache build-base=0.5-r3