Fix a typo in a comment

(cherry picked from commit b200ed928524fa60c8a76b79e337ddcd8fb9fbf8)

[skip ci]
diff --git a/print-bgp.c b/print-bgp.c
index 50bdddb..113af14 100644
--- a/print-bgp.c
+++ b/print-bgp.c
@@ -1575,7 +1575,7 @@
     /*
      * We can come here, either we did not have enough data, or if we
      * try to decode 4 byte ASs in 2 byte format. Either way, return 4,
-     * so that calller can try to decode each AS as of 4 bytes. If indeed
+     * so that caller can try to decode each AS as of 4 bytes. If indeed
      * there was not enough data, it will crib and end the parse anyways.
      */
     return 4;