[gnome-builder] plugins/copyright: fix typo

[Christian Hergert <chergert src gnome org>]

commit 80368c9d73949f7e57103c8d7746c15f3e552a64
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 15 13:28:15 2022 -0700

    plugins/copyright: fix typo
    
    Fixes broken updates of 2020-2021 style date ranges.

 src/plugins/copyright/gbp-copyright-util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/copyright/gbp-copyright-util.c b/src/plugins/copyright/gbp-copyright-util.c
index 0012fb1be..3b43e3b29 100644
--- a/src/plugins/copyright/gbp-copyright-util.c
+++ b/src/plugins/copyright/gbp-copyright-util.c
@@ -33,7 +33,7 @@ is_dash (const char *token)
 static inline gboolean
 isalnumdigit (char c)
 {
-  return c >= '0' && 'c' <= '9';
+  return c >= '0' && c <= '9';
 }
 
 static inline gboolean