fix(gitea) enable prometheus metrics on main service (#13477)

**Description**

The servicemonitor deployed with Gitea chart is bugged with the current
helm chart because metrics are not enabled on Gitea properly.


![image](https://github.com/truecharts/charts/assets/6644855/c803c7b5-8838-411e-a75d-9c92e60f9201)

The helm chart common.yaml template is looking for `metrics.enabled:
true` but it should be `metrics.main.enabled: true` as per the current
values.


![image](https://github.com/truecharts/charts/assets/6644855/87459c66-dc74-4d01-9c8c-26096af9098d)

This bug currently results in `app.ini` to have an empty value:


![image](https://github.com/truecharts/charts/assets/6644855/677575c6-8dc6-4ce6-aaca-53d3c42a221b)


**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [x] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
Deploy the helm chart with the change

**📃 Notes:**
<!-- Please enter any other relevant information here -->

**✔️ Checklist:**

- [x] ⚖️ My code follows the style guidelines of this project
- [x] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [x] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---------

Signed-off-by: Julien Nicolas de Verteuil <6644855+jndeverteuil@users.noreply.github.com>

charts/stable/gitea/Chart.yaml

@@ -30,7 +30,7 @@ sources:
   - https://gitea.com/gitea/helm-chart
   - https://github.com/go-gitea/gitea
 type: application
-version: 14.0.2
+version: 14.0.3
 annotations:
   truecharts.org/catagories: |
     - GIT

charts/stable/gitea/templates/_secrets.tpl

@@ -44,7 +44,7 @@ secret:
       {{- end }}
 
       [metrics]
-      ENABLED = {{ .Values.metrics.enabled }}
+      ENABLED = {{ .Values.metrics.main.enabled }}
       {{- range $catindex, $catvalue := .Values.customConfig }}
       {{- if eq $catvalue.name "metrics" }}
       {{- range $index, $value := $catvalue.keys }}

charts/stable/gitea/values.yaml

@@ -37,6 +37,9 @@ metrics:
   main:
     enabled: true
     type: "servicemonitor"
+    endpoints:
+      - port: main
+        path: /metrics
 ldap:
   enabled: false
   # name: