Fix numbered list not continuing in pom.html.

[ljkGH]

Documentation mentions:

There are three methods for dealing with this scenario

But the numbered list count is broken up.

Current:
======

---

Fix:
======

---

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[ljkGH]

not sure if the right way to bump but commenting to bump

https://arrow.apache.org/docs/developers/guide/step_by_step/pr_lifecycle.html

[slawekjaranowski]

@ljkGH please check - I hereby declare this contribution to be licenced under ...

[ljkGH]

@ljkGH please check - I hereby declare this contribution to be licenced under ...

done, thanks

[slawekjaranowski]

@ljkGH thanks,

similar is in https://maven.apache.org/pom.html#properties

[ljkGH]

@ljkGH thanks,

similar is in https://maven.apache.org/pom.html#properties

thanks, updating those as well #1622