Update README.md

Signed-off-by: Onri Jay Benally <[email protected]>

README.md

@@ -264,7 +264,7 @@ Free or Open Access Literature & More (Up to Graduate Level):
 
 | **Title**                                                          | **Link**                                                                                                                                                                                                                                                       |
 |--------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Olivier Ezratty's "Understanding Quantum Technologies"             | [https://www.oezratty.net/wordpress/wp-content/themes/Ezratty5/forcedownload.php?file=/Files/Publications/Understanding%20Quantum%20Technologies%2001ivier%20Ezratty%202024%20Letter.pdf](https://www.oezratty.net/wordpress/wp-content/themes/Ezratty5/forcedownload.php?file=/Files/Publications/Understanding%20Quantum%20Technologies%2001ivier%20Ezratty%202024%20Letter.pdf) |
+| Olivier Ezratty's "Understanding Quantum Technologies"             | [https://doi.org/10.48550/arXiv.2111.15352](https://doi.org/10.48550/arXiv.2111.15352) |
 | Olivier Ezratty's "Where are we heading with NISQ?"                | [https://doi.org/10.48550/arXiv.2305.09518](https://doi.org/10.48550/arXiv.2305.09518)                                                                                                                                                                        |
 | Computer-Inspired Quantum Experiments                              | [https://doi.org/10.48550/arXiv.2002.09970](https://doi.org/10.48550/arXiv.2002.09970)                                                                                                                                                                        |
 | Open Hardware in Quantum Technology                                | [https://doi.org/10.48550/arXiv.2309.17233](https://doi.org/10.48550/arXiv.2309.17233)                                                                                                                                                                        |