Change from png to jpg for images

CONTRIBUTING.md

@@ -8,9 +8,9 @@ When adding new versions, the following files should be updated:
 - `src/links/linux-links.ts`
   
   To get the linux link you should get the link for the `runfile (local)` option, the distribution doesn't matter as long as the architecture is `x86_64`, see the image below:
-  ![Linux link copy](images/linux-link.png)
+  ![Linux link copy](images/linux-link.jpg)
   Copy the link and paste it in a new entry of the `cudaVersionToURL` map:
-  ![Linux link paste](images/linux-link-code.png)
+  ![Linux link paste](images/linux-link-code.jpg)
 - `src/links/windows-links.ts`
 
   There are two windows links, one for the network installer (online) and one for the local installer (offline):
@@ -18,16 +18,16 @@ When adding new versions, the following files should be updated:
   The installer links can be copied by selecting the Windows platform, OS version doesn't matter (at the time of writing), and then select either `exe (local)` for the local installer, and `exe (network)` for the online installer. The link can be copied by right clicking the green `Download` button and selecting `Copy Link address`.
 
   #### Windows - Local installer:
-  ![Windows link local copy](images/windows-link-local.png)
+  ![Windows link local copy](images/windows-link-local.jpg)
 
   Then add a new entry in the `cudaVersionToURL` map with the link copied above:
-  ![Windows link local paste](images/windows-link-local-code.png)
+  ![Windows link local paste](images/windows-link-local-code.jpg)
 
   #### Windows - Network installer:
-  ![Windows link network copy](images/windows-link-network.png)
+  ![Windows link network copy](images/windows-link-network.jpg)
 
   Add a new entry in the `cudaVersionToNetworkUrl` map with the link copied in the above:
-  ![Windows link network paste](images/windows-link-network-code.png)
+  ![Windows link network paste](images/windows-link-network-code.jpg)