telega: Replace obsolete functions #923

Job	Run time
check (ubuntu-latest, 26.3, false)	1m 1s
check (ubuntu-latest, 27.2, false)	1m 7s
check (ubuntu-latest, 28.2, false)	1m 8s
check (ubuntu-latest, 29.3, false)	1m 19s
check (macos-latest, 28.2, false)	3m 4s
check (macos-latest, 29.3, false)	3m 25s
check (windows-latest, 26.3, false)	4m 22s
check (windows-latest, 27.2, false)	2m 39s
check (windows-latest, 28.2, false)	2m 24s
check (windows-latest, 29.3, false)	3m 13s
check (ubuntu-latest, snapshot, true)	49s
check (macos-latest, snapshot, true)	3m 15s
	27m 46s

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