Fix incorrect log type

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: jayqi

NEWS.md

@@ -4,7 +4,7 @@
 ## CHANGES
 
 ## BUGFIXES
-* Fixed runtime error when `FunctionReporter` extract edges from a function containing expressions of `externalptr` type. `FunctionReporter` will generally now ignore unknown expression types and instead log an error. (#344) 
+* Fixed runtime error when `FunctionReporter` extract edges from a function containing expressions of `externalptr` type. `FunctionReporter` will generally now ignore unknown expression types and instead log a warning. (#344) 
 
 # pkgnet 0.6.0
 ## NEW FEATURES