Updated issue templates to apply default labels (#4457)

.github/ISSUE_TEMPLATE/-net-sdk-bug.md

@@ -1,7 +1,9 @@
 ---
 name: ".NET SDK Bug"
 about: Create a bug report for a bug you found in the Bot Builder .NET SDK
-
+title: ""
+labels: "needs-triage, bug"
+assignees: ""
 ---
 
 ### [Github issues](https://github.com/Microsoft/botbuilder-dotnet/issues) should be used for bugs and feature requests. Use [Stack Overflow](https://stackoverflow.com/questions/tagged/botframework) for general "how-to" questions. 
@@ -26,6 +28,4 @@ Give a clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 ## Additional context
-Add any other context about the problem here.
-
-[bug]
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/-net-sdk-feature-request.md

@@ -1,10 +1,12 @@
 ---
 name: ".NET SDK Feature request"
 about: Suggest a feature for the Bot Builder .NET SDK
-
+title: ""
+labels: "needs-triage, feature-request"
+assignees: ""
 ---
 
-### Use this [query](https://github.com/Microsoft/botbuilder-dotnet/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen++label%3Aenhancement) to search for the most popular feature requests.
+### Use this [query](https://github.com/Microsoft/botbuilder-dotnet/issues?q=is%3Aissue+is%3Aopen++label%3Afeature-request+) to search for the most popular feature requests.
 
 **Is your feature request related to a problem? Please describe.**
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
@@ -17,5 +19,3 @@ 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.
-
-[enhancement]