ICU-22194 Fix typo in doc for BreakIterator rules update

diff --git a/docs/processes/rules_update.md b/docs/processes/rules_update.md
index 0459360e1d7496e54222e70e07db519b5e8d9787..8d32c8f207bcf7b643814f969f8fbfecae0a77dd 100644 (file)
--- a/docs/processes/rules_update.md
+++ b/docs/processes/rules_update.md
@@ -77,7 +77,7 @@ The rule updates are done first for ICU4C, and then ported (code changes) or mov
 
         diff icu4c/source/test/testdata/rbbitst.txt icu4j/main/tests/core/src/com/ibm/icu/dev/test/rbbi/rbbitst.txt
 
-    Should show no differrence.
+    Should show no difference.
 
 
 2.  **Run the ICU4C break iterator tests**, and verify that the newly added tests fail as expected.