internal/lsp/debug: update hardcoded version number to v0.7.4

Change-Id: Ic68775e50e5a2f5f4607ed660d30b59880eb754a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/370657
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: Peter Weinberger <pjw@google.com>
Trust: Peter Weinberger <pjw@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/internal/lsp/debug/info.go b/internal/lsp/debug/info.go
index 485460c..8428712 100644
--- a/internal/lsp/debug/info.go
+++ b/internal/lsp/debug/info.go
@@ -26,7 +26,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-const Version = "v0.7.3"
+const Version = "v0.7.4"
 
 // 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.