Add sponsoing hint to gh ticket templates (#16744)

Author: JonasHelming

.github/ISSUE_TEMPLATE/bug_report.md

@@ -24,3 +24,5 @@ about: Create a report to help us improve
 
 - Operating System:
 - Theia Version:
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+<!-- 💙 Eclipse Theia is community-supported. If you find it valuable, consider sponsoring the project: https://theia-ide.org/support/ -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,3 +7,8 @@ about: Propose an idea for the project
 
 <!-- Please provide a clear description of the feature and any relevant information. -->
 ### Feature Description:
+
+
+
+<!-- 💙 Eclipse Theia is community-supported. If you find it valuable, consider sponsoring the project: https://theia-ide.org/support/ -->
+