fix PR template wording (#15)

#### 📖 Summary

- generalize PR template wording

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

- [x] CI pipeline tests
- [ ] Custom test
- [ ] No test plan

##### Details / Justification

<!-- Add your test details or justification for missing tests here. -->

#### 📚 Additional Notes

<!-- A place for additional detail notes. -->

Reviewed-on: CodeServer/Container#15

.gitea/PULL_REQUEST_TEMPLATE.md

@@ -6,7 +6,7 @@
 
 > :bulb: Select your test plan for the code changes.
 
-- [ ] Tested via Drone.io pipeline
+- [x] CI pipeline tests
 - [ ] Custom test
 - [ ] No test plan