cmd/evm: fix typos in documentation (#27501)

cmd/evm/testdata/13/readme.md

 ## Input transactions in RLP form
 
-This testdata folder is used to examplify how transaction input can be provided in rlp form. 
+This testdata folder is used to exemplify how transaction input can be provided in rlp form. 
 Please see the README in `evm` folder for how this is performed. 
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cmd/evm/testdata/2/readme.md

-These files examplify a selfdestruct to the `0`-address. 
+These files exemplify a selfdestruct to the `0`-address. 
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cmd/evm/testdata/23/readme.md

-These files examplify how to sign a transaction using the pre-EIP155 scheme. 
+These files exemplify how to sign a transaction using the pre-EIP155 scheme. 

cmd/evm/testdata/3/readme.md

-These files examplify a transition where a transaction (excuted on block 5) requests
+These files exemplify a transition where a transaction (excuted on block 5) requests
 the blockhash for block `1`. 

cmd/evm/testdata/4/readme.md

-These files examplify a transition where a transaction (excuted on block 5) requests
+These files exemplify a transition where a transaction (excuted on block 5) requests
 the blockhash for block `4`, but where the hash for that block is missing. 
 It's expected that executing these should cause `exit` with errorcode `4`.

cmd/evm/testdata/5/readme.md

-These files examplify a transition where there are no transcations, two ommers, at block `N-1` (delta 1) and `N-2` (delta 2).
+These files exemplify a transition where there are no transactions, two ommers, at block `N-1` (delta 1) and `N-2` (delta 2).
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