fix(examples): fix React Load plugin example

[kkhaidukov]

Which problem is this PR solving?

• I wasn't able to run the React Load plugin example, this PR fixes that

Short description of the changes

• updates the config
• uses a more recent version of opentelemetry-collector-contrib
• adds missing dependencies
• updates the README
• sets the service name for the example

[linux-foundation-easycla]

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[linux-foundation-easycla]

• ❌ The commit (eade165) is missing the User's ID, preventing the EasyCLA check. Consult GitHub Help to resolve.For further assistance with EasyCLA, please submit a support request ticket.

[linux-foundation-easycla]

• ❌ The commit (b77c8c7) is missing the User's ID, preventing the EasyCLA check. Consult GitHub Help to resolve.For further assistance with EasyCLA, please submit a support request ticket.

[codecov]

Codecov Report

Merging #800 (cff7f1e) into main (2c4a834) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #800   +/-   ##
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  Coverage   94.91%   94.91%           
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  Files          14       14           
  Lines         708      708           
  Branches      142      142           
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  Hits          672      672           
  Misses         36       36