chore: updates contributing notes

Cmd/melegati ml (cdimascio#79)

* Handling real multi line entries.

* Using equals to compare objects.

* adds # line to multi-line ev test

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Co-authored-by: Jorge Melegati <jorge@jmelegati.com>
Co-authored-by: carmine <carmine@everco.ai>

update integrates OpenSSF badging details into README and CONTRIBUTING (

cdimascio#75)

* fixes cdimascio#63 string oob with ignore malformed

* update README and CONTRIBUTING

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Co-authored-by: carmine <carmine@everco.ai>

[StepSecurity] Apply security best practices (cdimascio#68)

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>

v2.3.0 change log

Merge branch 'master' of https://github.com/cdimascio/dotenv-java

java 8 compatibility improvements (cdimascio#18)