internal/lsp/debug: update version for v0.5.0

Change-Id: I45d13d7850c1a610087aabc5c15c2bb4e51a27a0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/253801
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
diff --git a/internal/lsp/debug/info.go b/internal/lsp/debug/info.go
index b070c99..522441a 100644
--- a/internal/lsp/debug/info.go
+++ b/internal/lsp/debug/info.go
@@ -23,7 +23,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-var Version = "master"
+var Version = "v0.5.0"
 
 // PrintServerInfo writes HTML debug info to w for the Instance.
 func (i *Instance) PrintServerInfo(ctx context.Context, w io.Writer) {