docs: update debugging references

# PR Summary
Commit 690cf2e moved the location of some of the debugging files. This PR adjusts sources to changes.

Change-Id: I082dee1c653f98149fd50bb733fc41fa3d6e93b0
GitHub-Last-Rev: 4c36af8
GitHub-Pull-Request: #3585
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/624135
Reviewed-by: Hyang-Ah Hana Kim <[email protected]>
Reviewed-by: Hongxiang Jiang <[email protected]>
kokoro-CI: kokoro <[email protected]>
Commit-Queue: Hyang-Ah Hana Kim <[email protected]>
Auto-Submit: Hyang-Ah Hana Kim <[email protected]>

Author: emmanuel-ferdman

docs/debugging.md

@@ -1134,9 +1134,9 @@ package. Follow Delve project's
 to send PRs.
 
 Code for integration with the Go extension is mostly in
-[`src/goDebugFactory.ts`](https://github.com/golang/vscode-go/blob/master/src/goDebugFactory.ts)
+[`src/goDebugFactory.ts`](https://github.com/golang/vscode-go/blob/master/extension/src/goDebugFactory.ts)
 and tests are in
-[`test/integration/goDebug.test.ts`](https://github.com/golang/vscode-go/blob/master/test/integration/goDebug.test.ts).
+[`test/integration/goDebug.test.ts`](https://github.com/golang/vscode-go/blob/master/extension/test/integration/goDebug.test.ts).
 Please take a look at VS Code Go project's
 [contribution guideline](contributing.md) to learn about how to prepare a change
 and send it for review.