Add Prometheus client_golang project idea

Signed-off-by: Arthur Silva Sens <arthur.sens@coralogix.com>

programs/lfx-mentorship/2024/01-Mar-May/project_ideas.md

@@ -19,3 +19,16 @@
 ## Proposed Project ideas
 
 ---
+
+### Prometheus
+
+#### Improve automations for the client_golang repository
+
+- Description: Prometheus' client_golang is the Prometheus SDK for metrics instrumentation for Go applications. Client_golang promises full support for the 3 latests major Go versions, and, on every new release of Go, several PRs need to be submitted updating go modules, unit tests, and removing/adding new metrics from go runtime. The project is about improving automation in all areas already mentioned.
+- Recommended Skills: Go runtime, shell, go testing
+- Mentor(s):
+  - [Arthur Sens](https://github.com/ArthurSens) (arthursens2005@gmail.com)
+  - [Kemal Akkoyun](https://github.com/kakkoyun) (email here)
+- Issue: 
+  - https://github.com/prometheus/client_golang/issues/1434
+  - Issue link