fix: add hiring notice to README

[vinckr]

Adds a notice that Ory is hiring to the top of README.
When this is approved, I would make the same changes to hydra etc.
As discussed with @BlueAcidFrog

[aeneasr]

Might make sense to set this in meta as a separate section or in the adopters file? then it's synced everywhere

[vinckr]

I could create a READMEHEADER.md in the style of ADOPTERS.md, the substitution will take care of the project related links and the others are just the same everywhere.
Then add a line to sync.sh and

<!--BEGIN READMEHEADER-->
<!--END READMEHEADER-->

in every README.
That should do the trick.
Then we can easily add dockertest and others later on.
Wdyt?

[codecov]

Codecov Report

Merging #2074 (48e5a16) into master (406d3f4) will increase coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 48e5a16 differs from pull request most recent head 3a0ece5. Consider uploading reports for the commit 3a0ece5 to get more accurate results

@@            Coverage Diff             @@
##           master    #2074      +/-   ##
==========================================
+ Coverage   74.93%   74.94%   +0.01%     
==========================================
  Files         293      293              
  Lines       15318    15318              
==========================================
+ Hits        11478    11480       +2     
+ Misses       3012     3011       -1     
+ Partials      828      827       -1     

Impacted Files	Coverage Δ
internal/testhelpers/e2e_server.go	89.56% <0.00%> (+1.73%)	⬆️

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[aeneasr]

SGTM!

[aeneasr]

We can merge this anyways, please add the badge to the other repos as well :)

[vinckr]

Ok :)

[aeneasr]

I updated the description a bit