.build.yml: Fix PostgreSQL import

When building on sr.ht the default environment is the home directory
so we need to change to the source directory before trying to import
the SQL file.

.build.yml

@@ -13,8 +13,8 @@ tasks:
       createuser -U postgres dspacestatistics
       psql -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
       createdb -U postgres -O dspacestatistics --encoding=UNICODE dspacestatistics
-      psql -U postgres -d dspacestatistics < tests/dspacestatistics.sql
       cd dspace-statistics-api
+      psql -U postgres -d dspacestatistics < tests/dspacestatistics.sql
       pipenv install --dev
   - test: |
       cd dspace-statistics-api