chore: Add SPM build validation step to PR template (#1478)

* Update PULL_REQUEST_TEMPLATE.md

* Update .github/PULL_REQUEST_TEMPLATE.md

Co-authored-by: Jithin Roy <[email protected]>

Co-authored-by: Jithin Roy <[email protected]>

Author: lawmicha

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,9 +2,10 @@
 
 *Description of changes:*
 
-*Check points:*
+*Check points: (check or cross out if not relevant)*
 
 - [ ] Added new tests to cover change, if needed
+- [ ] Build succeeds with all target using Swift Package Manager
 - [ ] All unit tests pass
 - [ ] All integration tests pass
 - [ ] Documentation update for the change if required