Bump golang from 1.25.6 to 1.26.0 in /deployments/container (#1619)

Bumps golang from 1.25.6 to 1.26.0.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

deployments/container/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.25.6 AS base
+FROM golang:1.26.0 AS base
 
 # The devel image is used for local development.
 FROM base AS devel