patch 8.2.0549: user systemd files not recognized

Problem:    User systemd files not recognized.
Solution:   Add filetype patterns. (Kevin Locke, closes #5914)
diff --git a/src/version.c b/src/version.c
index d7d504b..ea8f84d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    549,
+/**/
     548,
 /**/
     547,