[gnome-builder] cargo: fix typo

[Christian Hergert <chergert src gnome org>]

commit b5057dfef6a265ba5c1d9be42e7d5094a5fd41bf
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 24 11:17:35 2019 -0700

    cargo: fix typo

 src/plugins/cargo/cargo_plugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/cargo/cargo_plugin.py b/src/plugins/cargo/cargo_plugin.py
index d0c029373..0b43b2149 100644
--- a/src/plugins/cargo/cargo_plugin.py
+++ b/src/plugins/cargo/cargo_plugin.py
@@ -142,7 +142,7 @@ class CargoPipelineAddin(Ide.Object, Ide.PipelineAddin):
         if not config.props.debug:
             build_launcher.push_argv('--release')
 
-        # Configure Options get passed to "cargo rustc" because where is no
+        # Configure Options get passed to "cargo rustc" because there is no
         # equivalent "configure stage" for cargo.
         if config_opts:
             try: