Update IhexIdentifier to only search for one match.

[whyitfor]

• [x] I have reviewed the OFRAK contributor guide and attest that this pull request is in accordance with it.

One sentence summary of this PR (This should go in the CHANGELOG!) Bugfix in Intel Hex identifier to avoid regex matching the entire file.

Link to Related Issue(s) N/A.

Please describe the changes in your request.

• Update IhexIdentifier to use "max_matches" to only find first match
• Update regex to match on pattern of 2 valid ihex lines at beginning of file

These changes avoid matching on entire contents of a file encoded in Intel Hex format, making identification run faster.

Anyone you think should look at this, specifically? @EdwardLarson