Remove extraneous note from PR template

Author: Themitchell

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,3 @@
-<!-- markdownlint-disable-next-line first-line-heading -->
 # What is the change?
 
 <!-- Describe the intended changes. -->

scripts/githooks/check-markdown-format.sh

@@ -68,7 +68,8 @@ function run-markdownlint-natively() {
   # shellcheck disable=SC2086
   markdownlint \
     $files \
-    --config "$PWD/scripts/config/markdownlint.yaml"
+    --config "$PWD/scripts/config/markdownlint.yaml" \
+    --ignore "$PWD/.github/PULL_REQUEST_TEMPLATE.md"
 }
 
 # Run markdownlint in a Docker container.
@@ -86,7 +87,8 @@ function run-markdownlint-in-docker() {
     --volume "$PWD":/workdir \
     "$image" \
       $files \
-      --config /workdir/scripts/config/markdownlint.yaml
+      --config /workdir/scripts/config/markdownlint.yaml \
+      --ignore /workdir/.github/PULL_REQUEST_TEMPLATE.md
 }
 
 # ==============================================================================