Add TODO comment about Debian 13 Trixie

Refs FerretDB/FerretDB#5449.

Author: AlekSi

.github/workflows/ferretdb_packages.yml

@@ -210,9 +210,8 @@ jobs:
           go mod verify
           go run . -control-file ../../pg_documentdb/documentdb.control -pg-version ${{ matrix.pg }}
 
-      # Official Docker images are built on top of Debian 13 Trixie; use postgres:xx-bookworm for now:
-      # docker run --rm postgres:15 cat /etc/os-release
-      # docker run --rm postgres:15-bookworm cat /etc/os-release
+      # We should use deb13 once we switch to Debian 13 Trixie.
+      # TODO https://github.com/FerretDB/FerretDB/issues/5449
       - name: Download deb12-${{ matrix.pg }}-${{ steps.version.outputs.package_version }}
         uses: actions/download-artifact@v4
         with:

packaging/development.Dockerfile

@@ -2,6 +2,7 @@
 
 ARG POSTGRES_VERSION
 
+# TODO https://github.com/FerretDB/FerretDB/issues/5449
 FROM postgres:${POSTGRES_VERSION}-bookworm
 
 ARG TARGETARCH

packaging/production.Dockerfile

@@ -2,6 +2,7 @@
 
 ARG POSTGRES_VERSION
 
+# TODO https://github.com/FerretDB/FerretDB/issues/5449
 FROM postgres:${POSTGRES_VERSION}-bookworm
 
 ARG TARGETARCH