update links to lecture 1

schedule.md

@@ -15,7 +15,7 @@ Notes:
 
 Date    | Lecture/Tutorial/Meetup  | Topics | Responsibles
 --------|--------------|-------|---------
-8.01   |Lecture 1  | [Introduction to Big Data Platforms]() (download [PDF]()) and [Architecting Big Data Platforms]() (download [PDF]()) | **Linh Truong**
+8.01   |Lecture 1  | [Introduction to Big Data Platforms](lecturenotes/pdfs/module1-lecture1-1-intro-v0.6.0.pdf) and [Architecting Big Data Platforms](lecturenotes/pdfs/module1-lecture1-2-architectingbigplatforms-v0.6.pdf) | **Linh Truong**
 15.01  |Lecture 2  | [Service and Integration Models in Big Data Platforms](), (download [PDF]()). Additional slides: [Cloud Infrastructures for Big Data Platforms]() ([download PDF](lecturenotes/pdfs/module1-cloudinfrastructuresandservices-v0.5.pdf)) and [a Recap on Performance, Dependability, and Fault Tolerance in Distributed Systems](lecturenotes/pdfs/performance-dependability.pdf)| **Linh Truong**
 16.01  |Meetup 1 | [TechRadar]() and How [to prepare and succeed on Big Data assignments]()| **Hong-Tri Nguyen, Minh-Tri Nguyen, Linh Truong**
 22.01  |Lecture 3  | [Data Services in Big Data Platforms]() (download [PDF]()). Additional slides: [common systems & integration problems](lecturenotes/pdfs/module2-lecture3-bigdatastoragedatabase-addition-v0.5.pdf). and [A short example of metadata](https://aalto.cloud.panopto.eu/Panopto/Pages/Viewer.aspx?id=e54ba118-53c1-4097-9b12-acc2013ddb4f)| **Linh Truong**