docs: complementary collection telekom-mms.grafana

[Nemental]

SUMMARY

Added a section to the README mentioning the telekom-mms.grafana collection.

ISSUE TYPE

• Docs Pull Request

COMPONENT NAME

docs: README

ADDITIONAL INFORMATION

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7f05682) 71.06% compared to head (09353fd) 71.06%.

❗ Current head 09353fd differs from pull request most recent head 9e70a6d. Consider uploading reports for the commit 9e70a6d to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #322   +/-   ##
=======================================
  Coverage   71.06%   71.06%           
=======================================
  Files          18       18           
  Lines        1863     1863           
  Branches      321      321           
=======================================
  Hits         1324     1324           
  Misses        397      397           
  Partials      142      142           

Flag	Coverage Δ
integration	69.81% <ø> (ø)
sanity	23.70% <ø> (ø)
units	65.59% <ø> (ø)

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[rrey]

Merging without waiting for CI because the change is simply in the README.
Thanks @Nemental