Add subscript to issue templates (#5831)

Co-authored-by: otelbot <[email protected]>

Author: opentelemetrybot

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -137,3 +137,10 @@ body:
       placeholder: Node.js v20.12.1, Node.js v18.18.2, Firefox 130, Chrome 132, ...
     validations:
       required: false
+  - type: dropdown
+    attributes:
+      label: Tip
+      description: This element is static, used to render a helpful sub-heading for end-users and community members to help prioritize issues. Please leave as is.
+      options:
+        - <sub>[React](https://github.blog/news-insights/product-news/add-reactions-to-pull-requests-issues-and-comments/) with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding `+1` or `me too`, to help us triage it. Learn more [here](https://opentelemetry.io/community/end-user/issue-participation/).</sub>
+      default: 0

.github/ISSUE_TEMPLATE/discussion.md

@@ -10,3 +10,5 @@ labels: discussion
 
 - [ ] This only affects the JavaScript OpenTelemetry library
 - [ ] This may affect other libraries, but I would like to get opinions here first
+
+<sub>**Tip**: [React](https://github.blog/news-insights/product-news/add-reactions-to-pull-requests-issues-and-comments/) with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding `+1` or `me too`, to help us triage it. Learn more [here](https://opentelemetry.io/community/end-user/issue-participation/).</sub>

.github/ISSUE_TEMPLATE/feature_request.md

@@ -21,3 +21,5 @@ A clear and concise description of any alternative solutions or features you've
 ### Additional context
 
 Add any other context or screenshots about the feature request here.
+
+<sub>**Tip**: [React](https://github.blog/news-insights/product-news/add-reactions-to-pull-requests-issues-and-comments/) with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding `+1` or `me too`, to help us triage it. Learn more [here](https://opentelemetry.io/community/end-user/issue-participation/).</sub>

.github/ISSUE_TEMPLATE/request_for_instrumentation.md

@@ -27,3 +27,5 @@ Add any other context or screenshots about the plugin request here.
 -->
 
 #### Is there a reference you could point for the well-defined lifecycle methods**
+
+<sub>**Tip**: [React](https://github.blog/news-insights/product-news/add-reactions-to-pull-requests-issues-and-comments/) with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding `+1` or `me too`, to help us triage it. Learn more [here](https://opentelemetry.io/community/end-user/issue-participation/).</sub>