gopls/internal/lsp/debug: update debug version for v0.13.0

For golang/go#61583

Change-Id: I814c13a019c5d8ab6d73db29ad5d64930d8c1085
Reviewed-on: https://go-review.googlesource.com/c/tools/+/512956
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/gopls/internal/lsp/debug/info.go b/gopls/internal/lsp/debug/info.go
index 5ce23fc..46adeab 100644
--- a/gopls/internal/lsp/debug/info.go
+++ b/gopls/internal/lsp/debug/info.go
@@ -30,7 +30,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-const Version = "master"
+const Version = "v0.13.0"
 
 // ServerVersion is the format used by gopls to report its version to the
 // client. This format is structured so that the client can parse it easily.