docs: use new docsqa server address

[nomagick]

Fix docsqa server address

[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 1145, delta to last 2 avg.: -20%
• 🐎🐎🐎🐎 query QPS at 50, delta to last 2 avg.: +78%
• 🐎🐎🐎🐎 avg flow time within 1.4739 seconds, delta to last 2 avg.: +38%
• 🐢🐢 import jina within 0.3548 seconds, delta to last 2 avg.: -8%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1145	50	1.4739	0.3548
2.6.4	1253	25	1.0906	0.451
2.6.3	1633	30	1.0403	0.325

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