Update issue number to 40948 in changelog.

Author: franciscovalentecastro

.chloggen/fcovalente-filterprocessor-with-functions.yaml

@@ -10,7 +10,7 @@ component: filterprocessor
 note: Create `With*Functions` factory options to provide custom OTTL functions for logs, metrics or traces to the resulting filter processor.
 
 # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
-issues: [39698]
+issues: [40948]
 
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