Fix default rules section in documentation (#3857)

While browsing the rules documentation, I noticed **many** rules were both in the Default Rules and in the Opt In Rules section.

After looking into it, the docs of the `drop(while predicate: (Element) throws -> Bool` function states:

A closure that takes an element of the sequence as its argument and returns true if the element should be skipped or false if it should be included. **Once the predicate returns false it will not be called again.**

This caused the `defaultRuleDocumentations` array to contain almost all `ruleDocumentation`.

CHANGELOG.md

@@ -17,6 +17,10 @@
 * Fix crash in the `closure_end_indentation` rule when linting with Swift 5.6.  
   [JP Simard](https://github.com/jpsim)
   [#3830](https://github.com/realm/SwiftLint/issues/3830)
+
+* Fix default rules section in documentation.
+  [Natan Rolnik](https://github.com/natanrolnik)
+  [#3857](https://github.com/realm/SwiftLint/pull/3857)
 
 ## 0.46.2: Detergent Package
 

Source/SwiftLintFramework/Documentation/RuleListDocumentation.swift

@@ -32,7 +32,7 @@ public struct RuleListDocumentation {
     // MARK: - Private
 
     private var indexContents: String {
-        let defaultRuleDocumentations = ruleDocumentations.drop { $0.isOptInRule }
+        let defaultRuleDocumentations = ruleDocumentations.filter { !$0.isOptInRule }
         let optInRuleDocumentations = ruleDocumentations.filter { $0.isOptInRule }
 
         return """