chore(deps): update ghcr.io/pingcap-qe/cd/builders/tidb docker tag to v2026.10.11-7-g4832c5c-centos7-go1.25

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/pingcap-qe/cd/builders/tidb	minor	v2026.4.12-31-g809b8b4-centos7-go1.25 → v2026.10.11-7-g4832c5c-centos7-go1.25
ghcr.io/pingcap-qe/cd/builders/tidb	minor	v2026.7.19-6-gfc3279c-centos7-go1.25 → v2026.10.11-7-g4832c5c-centos7-go1.25
ghcr.io/pingcap-qe/cd/builders/tidb	minor	v2026.9.20-7-g5292897-centos7-go1.25 → v2026.10.11-7-g4832c5c-centos7-go1.25

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[wuhuizuo]

/hold