Fix Spack logo in slides, and fix the CMake exercise deadline date

Author: IshaanDesai

03_building_and_packaging/cmake_exercise.md

@@ -4,7 +4,7 @@ In this exercise, we need to fight. Not everything always works smoothly. This i
 
 To get an independent and reproducible environment as common ground, we use and, thus repeat, Docker.
 
-Deadline: **Thursday, November 27th, 2024, 9:00**
+Deadline: **Wednesday, November 27th, 2024, 9:00**
 
 ## Overview
 

03_building_and_packaging/spack_slides.md

@@ -75,7 +75,7 @@ slideOptions:
 
 ## Spack
 
-<img src="https://camo.githubusercontent.com/a01512f4480c4615a82f2b929789547a60d78e1f68d26be1a56e33d9258735d4/68747470733a2f2f63646e2e7261776769742e636f6d2f737061636b2f737061636b2f646576656c6f702f73686172652f737061636b2f6c6f676f2f737061636b2d6c6f676f2e737667" width=25%; style="margin-left:auto; margin-right:auto; padding-top: 25px; padding-bottom: 25px">
+<img src="https://camo.githubusercontent.com/f8ed788e9a5d82bce7104b98cf3d6f507ccf65e3496542065c9bd9cf3270d0a0/68747470733a2f2f63646e2e7261776769742e636f6d2f737061636b2f737061636b2f646576656c6f702f73686172652f737061636b2f6c6f676f2f737061636b2d6c6f676f2d746578742e737667" width=25%; style="margin-left:auto; margin-right:auto; padding-top: 25px; padding-bottom: 25px">
 
 [Project homepage (https://spack.io/)](https://spack.io/)