Update release notes for 2.6 release #941

Job	Run time
Run linters with pre-commit	1m 1s
Determine Python versions	4s
Test building the documentation	1m 32s
Python 3.12 on ubuntu-22.04 (standalone: false, 32bit: false)	56m 2s
Python 3.12 on ubuntu-22.04 (standalone: false, 32bit: true)	55m 20s
Python 3.12 on ubuntu-22.04 (standalone: true, 32bit: false)	21m 0s
Python 3.12 on ubuntu-22.04 (standalone: true, 32bit: true)	21m 5s
Python 3.12 on windows-2022 (standalone: false, 32bit: false)	1h 26m 35s
Python 3.12 on windows-2022 (standalone: false, 32bit: true)	1h 25m 21s
Python 3.12 on windows-2022 (standalone: true, 32bit: false)	27m 46s
Python 3.12 on windows-2022 (standalone: true, 32bit: true)	27m 1s
Python 3.12 on macOS-12 (standalone: false, 32bit: false)	1h 1m 30s
Python 3.12 on macOS-12 (standalone: false, 32bit: true)	57m 17s
Python 3.12 on macOS-12 (standalone: true, 32bit: false)	36m 53s
Python 3.12 on macOS-12 (standalone: true, 32bit: true)	18m 4s
Python 3.12 on macOS-14 (standalone: false, 32bit: false)	42m 29s
Python 3.12 on macOS-14 (standalone: false, 32bit: true)	40m 4s
Python 3.12 on macOS-14 (standalone: true, 32bit: false)	16m 28s
Python 3.12 on macOS-14 (standalone: true, 32bit: true)	13m 54s
Python 3.9 on ubuntu-22.04 (standalone: false, 32bit: false)	55m 54s
Python 3.9 on ubuntu-22.04 (standalone: true, 32bit: false)	19m 18s
Indicate completion to coveralls.io	3s
	12h 24m 41s

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