Everywhere: Fix spelling mistakes

Author: https://github.com/mjz19910
Commit: 10ec98dd38
Pull-request: https://github.com/SerenityOS/serenity/pull/11694
Reviewed-by: https://github.com/Dexesttp
Reviewed-by: https://github.com/creator1creeper1 ✅
Reviewed-by: https://github.com/linusg ✅

Meta/Lagom/Tools/CodeGenerators/LibUnicode/GeneratorUtil.h

@@ -53,7 +53,7 @@ public:
     IndexType ensure(StorageType value)
     {
         // We maintain a set of unique values in two structures: a vector which stores the values in
-        // the order they are added, and a hash map which maps that value to its index in the vetor.
+        // the order they are added, and a hash map which maps that value to its index in the vector.
         // The vector is to ensure the values are generated in an easily known order, and the map is
         // to allow quickly deciding if a value is actually unique (otherwise, we'd have to linearly
         // search the vector for each value).