plugins: fix kdoc annotation

The function is qemu_plugin_mem_get_value()

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250116160306.1709518-27-alex.bennee@linaro.org>

include/qemu/qemu-plugin.h

@@ -583,7 +583,7 @@ QEMU_PLUGIN_API
 bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info);
 
 /**
- * qemu_plugin_mem_get_mem_value() - return last value loaded/stored
+ * qemu_plugin_mem_get_value() - return last value loaded/stored
  * @info: opaque memory transaction handle
  *
  * Returns: memory value