Add changelog entry for post-processing change #10709

Job	Run time
analyze-other (python)	59s
analyze-other (actions)	56s
check-codeql-versions	34s
analyze-javascript (ubuntu-22.04)	4m 0s
analyze-javascript (ubuntu-24.04)	4m 19s
analyze-javascript (ubuntu-22.04, linked)	4m 8s
analyze-javascript (ubuntu-24.04, linked)	4m 40s
analyze-javascript (macos-13)	11m 3s
analyze-javascript (windows-2025, linked)	6m 2s
analyze-javascript (windows-2022, linked)	5m 25s
analyze-javascript (windows-2025)	6m 9s
analyze-javascript (macos-13, linked)	9m 48s
analyze-javascript (windows-2022)	6m 10s
analyze-javascript (macos-14, linked)	5m 55s
analyze-javascript (macos-14)	7m 56s
analyze-javascript (macos-15, linked)	9m 30s
analyze-javascript (macos-15)	9m 5s
	1h 36m 39s

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