docs(README.md): update readme to reflect post whale-api consolidation changes

[fuxingloh]

What this PR does / why we need it:

Remove "Watch this space!" since #580 has been closed and merged.

[codeclimate]

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Docker build preview for jellyfish/apps is ready!

Built with commit 6366c3c

• ghcr.io/jellyfishsdk/legacy-api:pr-1619
• ghcr.io/jellyfishsdk/ocean-api:pr-1619
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• ghcr.io/jellyfishsdk/ocean-api:6366c3c405980932d26c9397b223df1ca01099a3
• ghcr.io/jellyfishsdk/playground-api:6366c3c405980932d26c9397b223df1ca01099a3
• ghcr.io/jellyfishsdk/status-api:6366c3c405980932d26c9397b223df1ca01099a3
• ghcr.io/jellyfishsdk/whale-api:6366c3c405980932d26c9397b223df1ca01099a3

[codecov]

Codecov Report

Merging #1619 (00e6a9c) into main (905a3e7) will increase coverage by 0.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1619      +/-   ##
==========================================
+ Coverage   91.33%   91.57%   +0.23%     
==========================================
  Files         359      359              
  Lines       10351    10325      -26     
  Branches     1288     1285       -3     
==========================================
+ Hits         9454     9455       +1     
+ Misses        863      836      -27     
  Partials       34       34              

Impacted Files	Coverage Δ
packages/whale-api-client/src/api/oracles.ts	22.22% <0.00%> (-77.78%)	⬇️
apps/legacy-api/src/controllers/MiscController.ts	25.80% <0.00%> (-74.20%)	⬇️
...egacy-api/src/controllers/stats/StatsController.ts	25.92% <0.00%> (-62.97%)	⬇️
...pps/whale-api/src/module.health/probe.indicator.ts	37.50% <0.00%> (-62.50%)	⬇️
apps/whale-api/src/module.defid/defid.probes.ts	27.27% <0.00%> (-59.10%)	⬇️
apps/whale-api/src/module.model/_model.probes.ts	27.58% <0.00%> (-58.63%)	⬇️
packages/jellyfish-address/src/script/P2PKH.ts	54.16% <0.00%> (-45.84%)	⬇️
...y-api/src/controllers/stats/LegacyStatsProvider.ts	47.36% <0.00%> (-45.62%)	⬇️
apps/whale-api/src/module.api/oracle.controller.ts	44.00% <0.00%> (-44.00%)	⬇️
...tus-api/src/controllers/OverallStatusController.ts	60.00% <0.00%> (-40.00%)	⬇️
... and 53 more

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