cmd/worker: bump Go version to 1.25.5 in Dockerfile

Change-Id: Ic9a33ea2b26f27084866b3f8efda76a369f1f930
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/728100
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Nicholas Husin <husin@google.com>
Reviewed-by: Nicholas Husin <nsh@golang.org>
Auto-Submit: Ethan Lee <ethanalee@google.com>

Author: ethanalee-work

cmd/worker/Dockerfile

@@ -5,7 +5,7 @@
 # This Dockerfile expects the build context to be the repo root.
 
 ################################################################
-FROM golang:1.25.3 AS builder
+FROM golang:1.25.5 AS builder
 # If you change the Go version above, change the FROM line below as well.
 
 # Set the working directory outside $GOPATH to ensure module mode is enabled.
@@ -28,7 +28,7 @@ COPY . /src
 RUN go build -mod=readonly ./cmd/worker
 
 ################################################################
-FROM golang:1.25.3
+FROM golang:1.25.5
 
 LABEL maintainer="Go VulnDB Team <go-vulndb-team@google.com>"