package.json: update logOutput documentation in launch config

Update the list of accepted logOutput values and direct users to
the appropriate dlv command (dlv log) for details.

Change-Id: I5ed92f41d076c1d2eb8a4e471c965712beb6368b
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/295589
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Polina Sokolova <polina@google.com>
diff --git a/package.json b/package.json
index a928dbd..3768536 100644
--- a/package.json
+++ b/package.json
@@ -652,9 +652,10 @@
                   "gdbwire",
                   "lldbout",
                   "debuglineerr",
-                  "rpc"
+                  "rpc",
+                  "dap"
                 ],
-                "description": "Comma separated list of components that should produce debug output. Maps to dlv's `--log-output` flag.",
+                "description": "Comma separated list of components that should produce debug output. Maps to dlv's `--log-output` flag. Check `dlv log` for details.",
                 "default": "debugger"
               },
               "dlvLoadConfig": {
@@ -830,7 +831,7 @@
                   "rpc",
                   "dap"
                 ],
-                "description": "Comma separated list of components that should produce debug output. Maps to `--log-output` flag. `dap` is only applicable if using dlv-dap",
+                "description": "Comma separated list of components that should produce debug output. Maps to dlv's `--log-output` flag. Check `dlv log` for details.",
                 "default": "debugger"
               },
               "dlvLoadConfig": {