Added blob/main to the pptx and pdf addresses

course_contents/Contents.md

@@ -1,6 +1,6 @@
 # Contents
 
-To follow the introduction to Nextflow you can download this [powerpoint](https://biosustain.github.io/dsp_nextflow_trainin/course_contents/IntroNextflowFundamentals.pptx"). If you prefer it in pdf click in this link: <https://biosustain.github.io/dsp_nextflow_trainin/course_contents/course_contents/IntroNextflowFundamentals.pdf>
+To follow the introduction to Nextflow you can download this [powerpoint](https://biosustain.github.io/dsp_nextflow_training/blob/main/course_contents/IntroNextflowFundamentals.pptx"). If you prefer it in pdf click in this link: <https://biosustain.github.io/dsp_nextflow_training/blob/main/course_contents/IntroNextflowFundamentals.pdf>
 
 To follow the hands-on tutorial click [here](https://biosustain.github.io/dsp_nextflow_training/course_contents/Tutorial.html).