Bump the database-containers group

Bumps the database-containers group in /build/container/database with 3 updates: db2_community/db2, gvenzl/oracle-free and postgres.


Updates `db2_community/db2` from 12.1.2.0 to 12.1.3.0

Updates `gvenzl/oracle-free` from 23.9-slim-faststart to 23.26.0-slim-faststart

Updates `postgres` from 18.0 to 18.1

---
updated-dependencies:
- dependency-name: db2_community/db2
  dependency-version: 12.1.3.0
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: database-containers
- dependency-name: gvenzl/oracle-free
  dependency-version: 23.26.0-slim-faststart
  dependency-type: direct:production
  dependency-group: database-containers
- dependency-name: postgres
  dependency-version: '18.1'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: database-containers
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build/container/database/db2.Dockerfile

@@ -1,3 +1,3 @@
 # DB2
 # See https://icr.io/v2/db2_community/db2/tags/list
-FROM icr.io/db2_community/db2:12.1.2.0
+FROM icr.io/db2_community/db2:12.1.3.0

build/container/database/oracle.Dockerfile

@@ -1,3 +1,3 @@
 # Oracle
 # See https://hub.docker.com/r/gvenzl/oracle-free/tags
-FROM docker.io/gvenzl/oracle-free:23.9-slim-faststart
+FROM docker.io/gvenzl/oracle-free:23.26.0-slim-faststart

build/container/database/postgresql.Dockerfile

@@ -1,3 +1,3 @@
 # PostgreSQL
 # See https://hub.docker.com/_/postgres
-FROM docker.io/postgres:18.0
+FROM docker.io/postgres:18.1