chore: md template

.github/SANITY_UNUSED_DEPS_ISSUE_TEMPLATE.md

@@ -0,0 +1,15 @@
+---
+title: "chore: some installed deps are not needed"
+labels: C-debt, A-dependencies
+---
+
+Some dependencies specified in `Cargo.toml` are not needed.
+
+Check the [unused dependencies sanity check]({{env.WORKFLOW_URL}}) workflow for details.
+
+This issue was raised by the workflow at `.github/workflows/sanity.yml`.
+
+> **Note**
+> If this is a false positive, please refer to the [`cargo-udeps` docs][cargo-udeps-docs] on how to ignore the dependencies.
+
+[cargo-udeps-docs]: https://github.com/est31/cargo-udeps#ignoring-some-of-the-dependencies