Fix broken anchor links in documentation

Fixed broken anchor links that were pointing to incorrect section IDs:

- BigQuery migration guide: Updated arrayStringConcat link to use correct anchor #arrayStringConcat
- Tableau analysis tips: Updated trunc() link to use correct anchor #trunc

These links now correctly point to the autogenerated section IDs in the target documentation files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Blargian

docs/cloud/onboard/02_migrate/01_migration_guides/03_bigquery/01_overview.md

@@ -170,7 +170,7 @@ In the following, we provide a mapping of array operations from BigQuery to Clic
 | [ARRAY_CONCAT](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_concat) | [arrayConcat](/sql-reference/functions/array-functions#arrayConcat) |
 | [ARRAY_LENGTH](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_length) | [length](/sql-reference/functions/array-functions#length) |
 | [ARRAY_REVERSE](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_reverse) | [arrayReverse](/sql-reference/functions/array-functions#arrayReverse) |
-| [ARRAY_TO_STRING](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_to_string) | [arrayStringConcat](/sql-reference/functions/splitting-merging-functions#arraystringconcat) |
+| [ARRAY_TO_STRING](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_to_string) | [arrayStringConcat](/sql-reference/functions/splitting-merging-functions#arrayStringConcat) |
 | [GENERATE_ARRAY](https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#generate_array) | [range](/sql-reference/functions/array-functions#range) |
 
 **Create an array with one element for each row in a subquery**

docs/integrations/data-visualization/tableau/tableau-analysis-tips.md

@@ -57,5 +57,5 @@ ClickHouse has a huge number of functions that can be used for data analysis —
 - **`SKEWNESS([my_number])`** — Computes the sample skewness of a sequence. Equivalent of [`skewSamp()`](/sql-reference/aggregate-functions/reference/skewsamp).
 - **`SKEWNESSP([my_number])`** — Computes the skewness of a sequence. Equivalent of [`skewPop()`](/sql-reference/aggregate-functions/reference/skewpop).
 - **`TO_TYPE_NAME([field])`** *(added in v0.2.1)* — Returns a string containing the ClickHouse type name of the passed argument. Equivalent of [`toTypeName()`](/sql-reference/functions/other-functions#totypename).
-- **`TRUNC([my_float])`** — It is the same as the `FLOOR([my_float])` function. Equivalent of [`trunc()`](/sql-reference/functions/rounding-functions#truncate).
+- **`TRUNC([my_float])`** — It is the same as the `FLOOR([my_float])` function. Equivalent of [`trunc()`](/sql-reference/functions/rounding-functions#trunc).
 - **`UNHEX([my_string])`** *(added in v0.2.1)* — Performs the opposite operation of `HEX()`. Equivalent of [`unhex()`](/sql-reference/functions/encoding-functions#unhex).