docs(part1d): Change grammar on a sentence

Author: kevin8999

src/content/1/en/part1d.md

@@ -1170,7 +1170,7 @@ Copilot's chat also enables the creation of larger set of functionality. For exa
 
 The usefulness of Copilot and other language models in programming varies. The biggest problem with language models is [hallucination](https://en.wikipedia.org/wiki/Hallucination_(artificial_intelligence)). Large language models sometimes generate answers that may seem correct, but are completely wrong. In programming, errors in hallucinated code are often caught quickly when the code fails to run. However, some code generated by a language model may work at first but still have hidden issues, such as logic errors or security vulnerabilities.
 
-Another problem in applying language models to software development is that it is difficult for language models to "understand" larger projects. One major limitation of language models is that they are unable to implement changes across several files. Language models are also currently unable to generalize code. For example, if the programmer requests for new functionality that can be implemented with existing functions or components (even with minor adjustments), the language model fail to use them. This deteriorates the code base quality because the language models generate duplicate functions and components. For more information about this, read [this article](https://visualstudiomagazine.com/articles/2024/01/25/copilot-research.aspx).
+Another problem in applying language models to software development is that it is difficult for language models to "understand" larger projects. One major limitation of language models is that they are unable to implement changes across several files. Language models are also currently unable to generalize code. For example, if the programmer requests for new functionality that can be implemented with existing functions or components (even with minor adjustments), the language model may fail to use them. This deteriorates the code base quality because the language models generate duplicate functions and components. For more information about this, read [this article](https://visualstudiomagazine.com/articles/2024/01/25/copilot-research.aspx).
 
 If you choose to use language models when programming, remember that its output is your responsibility.
 
@@ -1182,7 +1182,7 @@ At this point, it is worth remembering the old wisdom of  [Brian Kerningham](htt
 
 In other words, since debugging is twice as difficult as programming, it is not worth creating code that you barely understand. How can debugging even be possible when the software developer does not understand the debugged code because they outsourced programming to a language model?
 
-So far, the development of language models and artificial intelligence is still at the stage where they are not self-sufficient, and the most difficult problems are left for humans to solve. Because of this, even novice software developers must learn to program really well just in case. It may be that, despite the development of language models, even more in-depth knowledge is needed. Artificial intelligence does the easy things, but a human is needed to sort out the most complicated messes caused by AI. GitHub Copilot is a very well-named product because it's a Copilot; a second pilot who helps the main pilot in an aircraft. The programmer is still the main pilot, the captain, and the one who bears the ultimate responsibility.
+So far, the development of language models and artificial intelligence is still at the stage where they are not self-sufficient, and the most difficult problems are left for humans to solve. Because of this, even novice software developers must learn to program really well just in case. It may be that, despite the development of language models, even more in-depth knowledge is needed. Artificial intelligence does the easy things, but a human is needed to sort out the most complicated messes caused by AI. GitHub Copilot is a very well-named product because it's a Copilot; a second pilot who helps the main pilot in an aircraft. The programmer is still the main pilot, the captain, and the one who ultimately bears the responsibility.
 
 Throughout this course, it may be in your own interest that you turn off Copilot by default and only rely on it in a real emergency.