Grammar and Clarity Improvements

[donatik27]

Changes

File: halo2-ecc/src/ecc/mod.rs

1. Added missing article "an":
   // Old:
   // is_started[idx] holds whether there is a 1 in bits with index at least (rounded_bitlen - idx)
   // New:
   // is_started[idx] holds whether there is a 1 in bits with an index at least (rounded_bitlen - idx)

2. Added missing article "an":
   // Old:
   // this all needs strict add_unequal since A can be non-randomly chosen by adversary
   // New:
   // this all needs strict add_unequal since A can be non-randomly chosen by an adversary

File: hashes/zkevm/src/sha256/README.md

1. Added missing "of":
   // Old:

• output (2): the hash digest the SHA-256 algorithm on the input bytes
  // New:
• output (2): the hash digest of the SHA-256 algorithm on the input bytes

2. Fixed adverb form:
   // Old:

• We convenient store the relevant cells
  // New:
• We conveniently store the relevant cells