Update README.md to add CnosDB into the Known Uses

[cnoshb]

Update README.md to add CnosDB into the Known Uses.
CnosDB is a Open Source Distributed Time Series Database which use arrow-datafusion.

Which issue does this PR close?

No issue.

Rationale for this change

CnosDB use arrow-datafusion as its query engine, so it's good to add the CnosDB into the Known Uses.

What changes are included in this PR?

Only Docs changes.

Are there any user-facing changes?

No.

[codecov-commenter]

Codecov Report

Merging #2933 (4df5e8e) into master (c528986) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2933      +/-   ##
==========================================
- Coverage   85.32%   85.32%   -0.01%     
==========================================
  Files         273      273              
  Lines       49343    49343              
==========================================
- Hits        42102    42101       -1     
- Misses       7241     7242       +1     

Impacted Files	Coverage Δ
datafusion/expr/src/window_frame.rs	92.43% <0.00%> (-0.85%)	⬇️
datafusion/physical-expr/src/expressions/binary.rs	95.03% <0.00%> (-0.09%)	⬇️
datafusion/core/src/physical_plan/metrics/value.rs	87.43% <0.00%> (+0.50%)	⬆️

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[ursabot]

Benchmark runs are scheduled for baseline = cb95042 and contender = b66dda5. b66dda5 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java