chore: tune issue templates (#961)

Author: dangreen

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -7,6 +7,10 @@ body:
     attributes:
       value: Thanks for taking the time to file a bug report! Please fill out this form as completely as possible.
 
+  - type: markdown
+    attributes:
+      value: ⚠️ react-chartjs-2 is just the wrapper around Chart.js, so if you are experiencing an issue with charts rendering, please create a related issue in [Chart.js repository](https://github.com/chartjs/Chart.js/issues).
+
   - type: checkboxes
     id: input1
     attributes:

.github/ISSUE_TEMPLATE/config.yml

@@ -3,4 +3,7 @@ blank_issues_enabled: false
 contact_links:
   - name: 🤔 Have a Question?
     url: https://stackoverflow.com/questions/tagged/react-chartjs-2
-    about: Feel free to ask questions on Stack Overflow
+    about: Feel free to ask questions on Stack Overflow.
+  - name: 📊 Have a Problem With Chart.js?
+    url: https://github.com/chartjs/Chart.js/issues
+    about: react-chartjs-2 is just the wrapper around Chart.js, so if you are experiencing an issue with charts rendering, please create a related issue in Chart.js repository.

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -6,6 +6,10 @@ body:
     attributes:
       value: Thanks for taking the time to suggest a new feature! Please fill out this form as completely as possible.
 
+  - type: markdown
+    attributes:
+      value: ⚠️ react-chartjs-2 is just the wrapper around Chart.js, so if you are experiencing an issue with charts rendering, please create a related issue in [Chart.js repository](https://github.com/chartjs/Chart.js/issues).
+
   - type: checkboxes
     id: input1
     attributes: