Update developing-hashes-crdb.md

[yanivhershkovich]

The line "Fields in hashes can be initialized as a string using HSET or HMSET or can be used to initialize counter types that are numeric integers using HINCRBY or floats using HINCRBYFLOAT." is outdated.

As per release notes for version 5.4.2 -
"The string data-type in CRDB is now implicitly and dynamically typed, just like open source Redis."

This means that it is no longer significant how the hash is initialized. If the value is numeric, Redis will be able to use it as a counter.
I only highlighted the line and haven't done any changes to it since I'm not sure if it should be removed or changed.
It will need to be consulted with PM/R&D.

[PazYanoverrr]

@bmansheim - Yaniv is correct. Apparently, this article was not updated appropriately. Same goes for the String page (- see my other PR)

[bmansheim]

Also update content/rs/developing/crdbs/strings.md

[kaitlynmichael]

@banker looks like this PR hasn't been updated in over a year. Can you give an update on the status?

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