software/jstestnode: fixup typo

Missing trailing /

See nexedi/slapos@5e1ff2de

software/jstestnode/buildout.hash.cfg

@@ -27,4 +27,4 @@ md5sum = 98faa5ad8cfb23a11d97a459078a1d05
 
 [template-runTestSuite]
 filename = runTestSuite.in
-md5sum = 54d585d50a3464100611774db68b72c0
+md5sum = 2bb3d71a0e04bc8bc828bb3f726ef3ff

software/jstestnode/runTestSuite.in

@@ -122,7 +122,7 @@ def main():
         if ('jio' in test_suite):
           url = f'{remote_access_url}/jio/test/tests.html'
         else:
-          url = f'{remote_access_url}/renderjs/test'
+          url = f'{remote_access_url}/renderjs/test/'
 
       is_browser_running = True
       agent = browser.execute_script("return navigator.userAgent")