Use upper case after Deprecated in doc

libkmod/libkmod-module.c

diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
index 199dc8d..8cb8603 100644
--- a/libkmod/libkmod-module.c
+++ b/libkmod/libkmod-module.c
@@ -577,7 +577,7 @@
  * @input: list of kmod_module to be filtered with blacklist
  * @output: where to save the new list
  *
- * Deprecated: use kmod_module_apply_filter instead.
+ * Deprecated: Use kmod_module_apply_filter instead.
  *
  * Given a list @input, this function filter it out with config's blacklist
  * and save it in @output.