qa: fix mongodb connection string env variable in workflow

Trailing slash leads to errors

Signed-off-by: Matthew Weier O'Phinney <matthew@weierophinney.net>

Author: weierophinney

.github/workflows/continuous-integration.yml

@@ -35,4 +35,4 @@ jobs:
         with:
           job: ${{ matrix.job }}
         env:
-          TESTS_LAMINAS_API_TOOLS_ADMIN_EXTMONGODB_CONNECTSTRING: mongodb://mongo/
+          TESTS_LAMINAS_API_TOOLS_ADMIN_EXTMONGODB_CONNECTSTRING: mongodb://mongo