internal/lsp/analysis: fix a doc comment typo

Fixes the grammar

Updates #50262

Change-Id: I8bc524b26d6cbeda3e626d0e83601529cbf7ff6e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/405540
Reviewed-by: Robert Findley <rfindley@google.com>
diff --git a/internal/lsp/analysis/embeddirective/embeddirective.go b/internal/lsp/analysis/embeddirective/embeddirective.go
index c925d8e..1b504f7 100644
--- a/internal/lsp/analysis/embeddirective/embeddirective.go
+++ b/internal/lsp/analysis/embeddirective/embeddirective.go
@@ -35,7 +35,7 @@
 	return nil, nil
 }
 
-// Check if comment contains //go:embed directive.
+// Check if the comment contains //go:embed directive.
 func hasEmbedDirectiveComment(f *ast.File) *ast.Comment {
 	for _, cg := range f.Comments {
 		for _, c := range cg.List {