internal/lsp/debug: update hardcoded version string for pre-release

Second pre-release.

Change-Id: I8962f033649b8916017d84601a2646b7edb79af5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216719
Reviewed-by: Robert Findley <rfindley@google.com>
diff --git a/internal/lsp/debug/info.go b/internal/lsp/debug/info.go
index 3a82a1f..c49aeeb 100644
--- a/internal/lsp/debug/info.go
+++ b/internal/lsp/debug/info.go
@@ -21,7 +21,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-var Version = "master"
+var Version = "v0.3.0-pre2"
 
 // PrintServerInfo writes HTML debug info to w for the Instance s.
 func PrintServerInfo(w io.Writer, s Instance) {