fix container dockerfile link in deploy_triton.md and update gap example in multi-node triton trt-llm example

[kshitizgupta21]

Issue #, if available:

Description of changes: fix container dockerfile link and update gap example in deploy_triton.md guide in multi-node triton trt-llm example

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.