docs(tracking): remove adding utm_source to links

[Roshanjossey]

Goals:

• removeutm_source query param for links in docs website

[github-actions]

Latency summary

Current PR yields:

• 🐎🐎🐎🐎 index QPS at 1357, delta to last 2 avg.: +18%
• 🐎🐎🐎🐎 query QPS at 80, delta to last 2 avg.: +13%
• 🐎🐎🐎🐎 avg flow time within 1.6099 seconds, delta to last 2 avg.: +17%
• 🐢🐢 import jina within 0.4533 seconds, delta to last 2 avg.: -6%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1357	80	1.6099	0.4533
3.4.3	979	63	1.2554	0.5385
3.4.2	1307	77	1.4742	0.4329

Backed by latency-tracking. Further commits will update this comment.