Fix incorrect test fixture

Author: grega

test/fixtures/nested-match-loss/README.md

@@ -10,7 +10,7 @@ docker compose build
 docker compose up -d
 ```
 
-### Database setup
+### Prepare schema
 
 ```bash
 rails db:migrate

test/hdi.bats

@@ -1064,15 +1064,14 @@ else:
   [ "$status" -eq 0 ]
   # "Database setup" is a ### inside "Set up" that doesn't match keywords
   # but should be preserved as a sub-heading group
-  [[ "$output" == *"### Database setup"* ]]
+  [[ "$output" == *"### Prepare schema"* ]]
   [[ "$output" == *"rails db:migrate"* ]]
 }
 
 @test "nested-match: deeper matching heading also shown in all mode" {
   run "$HDI" all --raw --ni "$FIXTURES/nested-match-loss"
   [ "$status" -eq 0 ]
   [[ "$output" == *"## Set up"* ]]
-  [[ "$output" == *"## Database setup"* ]]
   [[ "$output" == *"## Prerequisites"* ]]
   [[ "$output" == *"## Testing"* ]]
 }