Update canonical link to the mapping section (#11370) (#11384)

(cherry picked from commit d25d529)

Signed-off-by: Fanit Kolchina <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

_field-types/index.md

@@ -8,7 +8,7 @@ redirect_from:
   - /opensearch/mappings/
   - /field-types/mappings/
   - /field-types/index/
-canonical_url: https://docs.opensearch.org/latest/field-types/
+canonical_url: https://docs.opensearch.org/latest/mappings/
 ---
 
 # Mappings and field types