Add resource for Uptime Load in Linux (#7838)

* Resource for Uptime Load in Linux

Added 2 article link.

* Update src/data/roadmaps/linux/content/105-server-review/100-uptime-load.md

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Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

src/data/roadmaps/linux/content/105-server-review/100-uptime-load.md

@@ -14,3 +14,7 @@ $ uptime
 ```
 
 In the output above, "2 days, 20 min" tells us how long the system has been up, while "0.00, 0.01, 0.05" shows the system's load average over the last one, five, and fifteen minutes, respectively.
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+Learn more from the following resources:
+
+- [@article@Linux Load Average: What is Load Average in Linux?](https://www.digitalocean.com/community/tutorials/load-average-in-linux)