Fix password

.github/workflows/linux-postgres-cxx20.yaml

@@ -61,9 +61,10 @@ jobs:
           $CXX --version
           cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=20 -DSQLGEN_BUILD_TESTS=ON -DSQLGEN_SQLITE3=OFF 
           cmake --build build
-      - name: Launch postgres
+      - name: Set up postgres
         run: |
           sudo systemctl start postgresql.service
+          sudo -u postgres psql -c "ALTER USER postgres PASSWORD 'password';"
       - name: Run tests
         run: |
           ctest --test-dir build --output-on-failure