Fix BRV slugs

Author: mrtnzlml

docs/learn/deprecated/business-rules-validation/configuration-examples.md

@@ -2,7 +2,7 @@
 sidebar_position: 1
 title: 'Business Rules Validation: Configuration examples'
 sidebar_label: 'Configuration examples'
-slug: '/learn/business-rules-validations/configuration-examples'
+slug: '/learn/business-rules-validation/configuration-examples'
 ---
 
 import Deprecated from '../../\_deprecated.md';

docs/learn/deprecated/business-rules-validation/expression-engine.md

@@ -3,7 +3,7 @@ sidebar_position: 2
 title: 'Business Rules Validation: Expression Engine'
 sidebar_label: 'Expression Engine'
 toc_max_heading_level: 4
-slug: '/learn/business-rules-validations/expression-engine'
+slug: '/learn/business-rules-validation/expression-engine'
 ---
 
 import Deprecated from '../../\_deprecated.md';

docs/learn/deprecated/business-rules-validation/index.md

@@ -1,7 +1,7 @@
 ---
 title: 'Business Rules Validation'
 sidebar_position: 1
-slug: '/learn/business-rules-validations'
+slug: '/learn/business-rules-validation'
 ---
 
 import Deprecated from '../../\_deprecated.md';