docs: Add Certora report to README (#384) #7

Job	Run time
verify (non-4626/Alex-gho-gsm_inverse.conf)	7m 5s
verify (non-4626/Alex-gho-gsm.conf)	5m 40s
verify (non-4626/balances-buy.conf)	3m 59s
verify (non-4626/balances-sell.conf)	4m 42s
verify (non-4626/Dominik-gho-assetToGhoInvertibility.conf --rule basicProperty_getAssetAmountForB...	4m 25s
verify (non-4626/Dominik-gho-fixedPriceStrategy.conf)	1m 18s
verify (non-4626/fees-buy.conf)	5m 58s
verify (non-4626/fees-sell.conf)	8m 17s
verify (non-4626/otakar-FixedFeeStrategy.conf)	1m 16s
verify (non-4626/Martin-gho-gsm.conf)	17m 9s
verify (non-4626/antti-optimality.conf --rule R3_optimalityOfSellAsset_v1 R1_optimalityOfBuyAsset...	4m 38s
verify (non-4626/otakar-getAmount_properties.conf --rule getAssetAmountForBuyAsset_funcProperty_L...	4m 17s
verify (non-4626/otakar-finishedRules.conf --rule whoCanChangeExposure whoCanChangeAccruedFees se...	41m 6s
verify (non-4626/otakar-OracleSwapFreezer.conf)	3m 53s
	1h 53m 43s

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