Create PULL_REQUEST_TEMPLATE (#1613)

* Create PULL_REQUEST_TEMPLATE

Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Alexandra Tran Carrillo <12214231+alexandratran@users.noreply.github.com>
Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

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Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>
Co-authored-by: Alexandra Tran Carrillo <12214231+alexandratran@users.noreply.github.com>

.github/workflows/PULL_REQUEST_TEMPLATE

@@ -0,0 +1,14 @@
+## Description
+
+<!-- Briefly describe the changes made in your pull request (PR) below. -->
+
+### Issue(s) fixed
+
+<!-- Include the issue number that this PR fixes. {Example: Fixes #123} -->
+
+Fixes #
+
+### Preview
+
+<!-- Provide a PR preview link to the page(s) changed. {Example: https://besu-docs-git-100-branch-hyperledger.vercel.app} -->
+