Tracing PHP Application page refers to outdated tracer version for PHP 5

[AlexandreSajus]

Documentation Page

https://docs.datadoghq.com/tracing/trace_collection/automatic_instrumentation/dd_libraries/php/

Issue Description

The documentation for tracing PHP applications explains that PHP 5 users can not use the versions >= 1.0 of the PHP tracer. Instead they can use the tracer up to "0.99".

Unfortunately the link associated to "0.99" leads to our GitHub page for the release of version 0.99.0 which immediately warns of a memory leak issue with this version and that users should upgrade to 0.99.1 which fixes the issue.

On the documentation page, the link associated to "0.99" should directly point to the 0.99.1 version to not scare users unnecessarily. We unfortunately lost a prospect because they feared the memory leak issue, even after upgrading to 0.99.1