Everywhere: Fix more typos

Author: https://github.com/linusg
Commit: bcfc6f0c57
Pull-request: https://github.com/SerenityOS/serenity/pull/3668
Reviewed-by: https://github.com/bugaevc
Reviewed-by: https://github.com/xTibor

AK/String.h

@@ -252,7 +252,7 @@ public:
 
     StringView view() const;
 
-    int replace(const String& needle, const String& replacement, bool all_occurences = false);
+    int replace(const String& needle, const String& replacement, bool all_occurrences = false);
 
     template<typename T, typename... Rest>
     bool is_one_of(const T& string, Rest... rest) const