Update config/README.md with more details about configURI

[bogdandrutu]

Signed-off-by: Bogdan Drutu [email protected]

[codecov]

Codecov Report

Merging #5381 (3e6f183) into main (7e97a21) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5381      +/-   ##
==========================================
+ Coverage   90.62%   90.65%   +0.03%     
==========================================
  Files         190      190              
  Lines       11433    11433              
==========================================
+ Hits        10361    10365       +4     
+ Misses        851      848       -3     
+ Partials      221      220       -1     

Impacted Files	Coverage Δ
pdata/internal/common.go	92.56% <0.00%> (+0.74%)	⬆️

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