fix(qabot): hide the slot elements on the docs page

[shazhou2015]

Goals:
Add a template to prevent the qabot slot elements from showing on the docs pages.

[nomagick]

LGTM

[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1146, delta to last 2 avg.: -4%
• 😶 query QPS at 64, delta to last 2 avg.: +0%
• 🐢🐢 avg flow time within 1.2851 seconds, delta to last 2 avg.: -25%
• 🐎🐎 import jina within 0.5651 seconds, delta to last 2 avg.: +7%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1146	64	1.2851	0.5651
3.4.3	1342	73	1.5446	0.4527
3.4.2	1049	54	1.9285	0.6025

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