chore(deps): update dependency golang to v1.26

Author: renovate[bot]

.github/workflows/reusable-e2e.yml

@@ -27,7 +27,7 @@ on:
 
 # set up environment variables to be used across all the jobs
 env:
-  GOLANG_VERSION: "1.25.x"
+  GOLANG_VERSION: "1.26.x"
   KIND_VERSION: "v0.31.0"
   K8S_VERSION: "v1.35.1"
   REGISTRY: "ghcr.io/${{ github.repository_owner }}/postgresql-trunk"