Update changelog

Author: jackc

CHANGELOG.md

@@ -1,3 +1,10 @@
+# 4.18.3 (March 9, 2024)
+
+Use spaces instead of parentheses for SQL sanitization.
+
+This still solves the problem of negative numbers creating a line comment, but this avoids breaking edge cases such as
+`set foo to $1` where the substitution is taking place in a location where an arbitrary expression is not allowed.
+
 # 4.18.2 (March 4, 2024)
 
 Fix CVE-2024-27289