Merge pull request #531 from microsoft/PSLRJ-US-21166

fix: Integrate Missing GitHub Actions template

Author: Prajwal-Microsoft

.github/ISSUE_TEMPLATE/subtask.md

@@ -0,0 +1,22 @@
+---
+name: Sub task
+about: A sub task
+title: ''
+labels: subtask
+assignees: ''
+
+---
+
+Required by <link to parent issue>
+
+# Description
+
+A clear and concise description of what this subtask is.
+
+# Tasks
+
+_To be filled in by the engineer picking up the subtask
+
+- [ ] Task 1
+- [ ] Task 2
+- [ ] ...