Fix Complement runs always being Postgres (#13034)

* Fix Complement runs always being Postgres

* Newsfile

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

.github/workflows/tests.yml

@@ -347,7 +347,7 @@ jobs:
 
       - run: |
           set -o pipefail
-          POSTGRES=${{ (matrix.database == 'Postgres') && 1 }} COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -json 2>&1 | gotestfmt
+          POSTGRES=${{ (matrix.database == 'Postgres') && 1 || '' }} COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -json 2>&1 | gotestfmt
         shell: bash
         name: Run Complement Tests
 

changelog.d/13034.misc

+Enable testing against PostgreSQL databases in Complement CI.
\ No newline at end of file