Changed presentations link format and added pdf files

Author: kimiaKR

content/events/2024-2025/2024-11-19-tech-talk-night.md

@@ -15,6 +15,10 @@ background: "images/orientation2018-min.jpeg"
 publishdate: 2024-11-12
 ---
 
-Rebecca's Presentation: [link](https://cdn.discordapp.com/attachments/1301944929681145858/1308618884231729237/CCSS_Tech_Talk_RKempe_condensed.pdf?ex=6745da0e&is=6744888e&hm=20aed90065923107c3f24245f1f41ca7f55481f8fc5e7a150e16bda86fb0b83a&)
-Alan's Presentation: [link](https://cdn.discordapp.com/attachments/1301944929681145858/1308822137162694806/Introduction_to_R_Programming_Slides.pdf?ex=6745ee9a&is=67449d1a&hm=6e789aa04ff27808dd815fd6f9903b3902a787d7326e0ad800fb8be77b369dda&)
-Spencer's Presentation: [link](https://cdn.discordapp.com/attachments/1301944929681145858/1308649551955234846/SCraig_CS-Presentation.pdf?ex=6745f69e&is=6744a51e&hm=0cb6c3a13121474699fcbaeb5f5bfc6fdcda257f8a07252418971e3c58282bcd&)
+Rebecca's Presentation: [link](\pdfs\2024-2025\CCSS_Tech_Talk_RKempe_condensed.pdf).
+
+Alan's Presentation: [link](\pdfs\2024-2025\Introduction_to_R_Programming_Slides.pdf). 
+
+Spencer's Presentation: [link](\pdfs\2024-2025\SCraig_CS-Presentation.pdf).
+
+