fix(ci): update Go version to 1.25 in Dockerfile and CI workflow

go.mod requires go >= 1.25.5, align Dockerfile and GitHub Actions.

Signed-off-by: Pavan Madduri <pavan4devops@gmail.com>
Signed-off-by: pmady <pavan4devops@gmail.com>

Author: pmady

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.25'
 
       - name: Build
         run: CGO_ENABLED=1 go build -v ./cmd/keda-gpu-scaler/
@@ -34,7 +34,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: '1.25'
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v7

Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM golang:1.23-bookworm AS builder
+FROM golang:1.25-bookworm AS builder
 
 # Install build dependencies for CGO (required by go-nvml)
 RUN apt-get update && apt-get install -y --no-install-recommends \