Docs: Update minimum-should-match.asciidoc

Add %-sign to examle in the last section

Closes #8157
Docs: Update filtered-query.asciidoc

Fix mistyping

Closes #8167
Docs: Provide example of deleting a repository

Example of deleting a repository with explanation that snapshots themselves are left untouched.

Closes #8172
Tests: Fix SearchFieldsTests after changes to TimestampFieldMapper.
Docs: missing quote

fix missing quote

Closes #8176