internal/lsp/debug: update hard-coded version for v0.8.0

For golang/go#51074

Change-Id: I37c665d226ec83e901c4d85b451d1ca65c2043a2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/388438
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/internal/lsp/debug/info.go b/internal/lsp/debug/info.go
index 5b9dc58..35eff4d 100644
--- a/internal/lsp/debug/info.go
+++ b/internal/lsp/debug/info.go
@@ -29,7 +29,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-const Version = "v0.8.0-pre.2"
+const Version = "v0.8.0"
 
 // 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.