feat: Add ESnet to use-cases service-map.jsx (#820)

* feat: add ESnet to use-cases service-mao.jsx

Signed-off-by: ADITYA TIWARI <[email protected]>

* fix: import path for image

Signed-off-by: ADITYA TIWARI <[email protected]>

* Revise ESnet case study title and description

Updated case study details for ESnet to reflect new title and description emphasizing network observability with Hubble.

Signed-off-by: ADITYA TIWARI <[email protected]>

* Clean up description in service-map.jsx

Removed HTML tags from the description text.

Signed-off-by: ADITYA TIWARI <[email protected]>

* Revise ESnet case study title and description

Updated case study details for ESnet, changing the title and description to reflect the use of Cilium and IPv6.

Signed-off-by: ADITYA TIWARI <[email protected]>

* Update service-map description and quote details

Signed-off-by: ADITYA TIWARI <[email protected]>

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Signed-off-by: ADITYA TIWARI <[email protected]>

Author: ADITYATIWARI342005