Gerwin Klein 45dc26ded9 github/proofs: update to Isabelle2021 ... The proofs have switched to a new Isabelle version. Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>		2021-10-01 10:01:17 +10:00
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workflows	github/proofs: update to Isabelle2021	2021-10-01 10:01:17 +10:00