[lldb-dap] Fix links to LLVM issue tracker and pull requests (#118681)

Currently, the link to the issue tracker takes you to the Github source
repository, rather than the Github issue tracker. This fixes the link
and includes the lldb-dap label in both the issue and PR URL.

Author: JDevlieghere

lldb/tools/lldb-dap/README.md

@@ -324,8 +324,8 @@ API for handling a custom event from an extension.
 ## Contributing
 
 `lldb-dap` and `lldb` are developed under the umbrella of the [LLVM project](https://llvm.org/).
-The source code is [part of the LLVM repository](https://github.com/llvm/llvm-project/tree/main/lldb/tools/lldb-dap) on Github.
-We use Github's [issue tracker](https://github.com/llvm/llvm-project/tree/main/lldb/tools/lldb-dap) and patches can be submitted via [pull requests](https://github.com/llvm/llvm-project/pulls).
+The source code is part of the [LLVM repository](https://github.com/llvm/llvm-project/tree/main/lldb/tools/lldb-dap) on Github.
+We use Github's [issue tracker](https://github.com/llvm/llvm-project/issues?q=label%3Alldb-dap) and patches can be submitted via [pull requests](https://github.com/llvm/llvm-project/pulls?q=label%3Alldb-dap).
 Furthermore, there is a [LLDB category](https://discourse.llvm.org/c/subprojects/lldb/8) on the LLVM discourse forum.
 
 For instructions on how to get started with development on lldb-dap, see the "[Contributing to lldb-dap](https://lldb.llvm.org/resources/lldbdap.html)"