workflow(issue template): wording

Author: cloydlau

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -3,7 +3,7 @@ description: Create a report to help us improve
 body:
   - type: checkboxes
     attributes:
-      label: "Before you start, make sure to:"
+      label: "Before you start, please make sure to:"
       description: More than half issues of json-editor-vue turned out to be invalid or irrelevant.
       options:
       - label: Read the [doc](https://github.com/cloydlau/json-editor-vue/blob/main/README.md)

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -4,7 +4,7 @@ labels: [":sparkles: feature request"]
 body:
   - type: checkboxes
     attributes:
-      label: "Before you start, make sure to:"
+      label: "Before you start, please make sure to:"
       description: More than half issues of json-editor-vue turned out to be invalid or irrelevant.
       options:
       - label: Read the [doc](https://github.com/cloydlau/json-editor-vue/blob/main/README.md)