Use env key

See https://docs.github.com/en/actions/learn-github-actions/variables

Author: thekid

.github/workflows/ci.yml

@@ -59,6 +59,6 @@ jobs:
       run: sh xp-run xp.unittest.TestRunner src/test/php
 
     - name: SQLite integration test suite
-      run: >
-        export SQLITE_DSN=sqlite://./unittest.db
-        sh xp-run xp.unittest.TestRunner src/it/php
+      env:
+        SQLITE_DSN: sqlite://./unittest.db
+      run: sh xp-run xp.unittest.TestRunner src/it/php