Bump golang from 1.26.4-bookworm to 1.26.5-bookworm in the docker-dependencies group (#747)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Build the libvirt-provider binary
-FROM --platform=$BUILDPLATFORM golang:1.26.4-bookworm AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.5-bookworm AS builder
 
 # Prevent Go from downloading a different toolchain at build time.
 # The Docker image IS the toolchain — if go.mod requires something newer,