[doc] release Flink Doris Connector 26.1.1

[JNSimba]

Versions

• dev
• 4.x
• 3.x
• 2.1 or older (not covered by version/language sync gate)

Languages

• Chinese
• English
• Japanese candidate translation needed

Docs Checklist

• Checked by AI
• Test Cases Built
• Updated required version and language counterparts, or explained why not
• If only one language changed, confirmed whether source/translation counterparts need sync

Summary

Release Flink Doris Connector 26.1.1, superseding 26.1.0.

• Version table in flink-doris-connector.md (dev + 4.x, EN + zh-CN): replace 26.1.0 row with 26.1.1.
• release-notes.md (dev + 4.x, EN + zh-CN): prepend a 26.1.1 section.
  • Bug fix: batch sink potentially freezing during prolonged operation when compression is enabled ([Fix](batch) Prevent writer deadlock from currentCacheBytes drift doris-flink-connector#653).
  • Credits: @addu390
• Download page (src/constant/download.data.ts): replace 26.1.0 entry (label/value/source/binary URLs and the FLINK_SAME_SOURCE_2610 constant) with 26.1.1.

Release notes reference: apache/doris-flink-connector#654