test: Give book tests more time under nextest (#4680)

.config/nextest.toml

@@ -16,9 +16,15 @@ test-group = 'test-dbs'
 # the database has already been setup. For now, we can use cargo test instead.
 max-threads = 1
 
+[[profile.default.overrides]]
+# cli tests take a bit longer
+filter = 'test(cli)'
+slow-timeout = {period = "1s"}
+
 [[profile.default.overrides]]
 filter = 'package(mdbook-prql)'
-slow-timeout = {period = "8s", terminate-after = 2}
+# These are testing dozens of queries, so we give them more time.
+slow-timeout = {period = "20s", terminate-after = 2}
 test-group = 'docs-mdbook'
 
 [test-groups.docs-mdbook]