Fix internal fragmtn links in optimization.md

Author: Munter

src/content/configuration/optimization.md

@@ -293,7 +293,7 @@ module.exports = {
 
 `bool`
 
-Tells webpack to determine used exports for each module. This depends on [`optimization.providedExports`](#optimization-occurrenceorder). Information collected by `optimization.usedExports` is used by other optimizations or code generation i.e. exports are not generated for unused exports, export names are mangled to single char identifiers when all usages are compatible. 
+Tells webpack to determine used exports for each module. This depends on [`optimization.providedExports`](#optimizationoccurrenceorder). Information collected by `optimization.usedExports` is used by other optimizations or code generation i.e. exports are not generated for unused exports, export names are mangled to single char identifiers when all usages are compatible.
 Dead code elimination in minimizers will benefit from this and can remove unused exports.
 By default `optimization.usedExports` is enabled in `production` [mode](/concepts/mode/) and disabled elsewise. 
 
@@ -312,8 +312,8 @@ module.exports = {
 
 `bool`
 
-Tells webpack to find segments of the module graph which can be safely concatenated into a single module. Depends on [`optimization.providedExports`](#optimization-providedexports) and [`optimization.usedExports`](#optimization-usedexports).
-By default `optimization.concatenateModules` is enabled in `production` [mode](/concepts/mode/) and disabled elsewise. 
+Tells webpack to find segments of the module graph which can be safely concatenated into a single module. Depends on [`optimization.providedExports`](#optimizationprovidedexports) and [`optimization.usedExports`](#optimizationusedexports).
+By default `optimization.concatenateModules` is enabled in `production` [mode](/concepts/mode/) and disabled elsewise.
 
 __webpack.config.js__