chore: request artifact in issue template (#1996)

* chore: request artifact in issue template

Signed-off-by: Will Murphy <will.murphy@anchore.com>

* Apply suggestions from code review

Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>
Signed-off-by: William Murphy <willmurphyscode@users.noreply.github.com>

* Update .github/ISSUE_TEMPLATE/bug_report.md

Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>
Signed-off-by: William Murphy <willmurphyscode@users.noreply.github.com>

---------

Signed-off-by: Will Murphy <will.murphy@anchore.com>
Signed-off-by: William Murphy <willmurphyscode@users.noreply.github.com>
Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -13,6 +13,18 @@ assignees: ''
 
 **How to reproduce it (as minimally and precisely as possible)**:
 
+<!--
+If possible, please include a link to an artifact grype can scan, instructions to make
+one, or upload it on this issue. Some suggestions:
+
+1. Link to Dockerhub, GitHub, GitLab, maven central, quay.io, etc to a public
+ artifact we can try scanning
+2. A Dockerfile that we can build and scan
+3. A simple script that creates a directory exhibiting the issue, for example a
+ list of `npm install` commands
+
+Please also include the grype command and any configuration used.
+-->
 **Anything else we need to know?**:
 
 **Environment**: