Merge pull request #626 from Kotlin/wrs-fixes

fix broken links

Author: koperagen

docs/StardustDocs/topics/hierarchical.md

@@ -5,7 +5,7 @@
 * [`ColumnGroup`](DataColumn.md#columngroup) is a group of [columns](DataColumn.md)
 * [`FrameColumn`](DataColumn.md#framecolumn) is a column of [dataframes](DataFrame.md)
 
-You can read [`DataFrame`](DataFrame.md) [from json](read.md#reading-json) or [from in-memory object graph](createDataFrame.md#todataframe) preserving original tree structure.
+You can read [`DataFrame`](DataFrame.md) [from json](read.md#read-from-json) or [from in-memory object graph](createDataFrame.md#todataframe) preserving original tree structure.
 
 Hierarchical columns can also appear as a result of some [modification operations](modify.md):
 * [group](group.md) produces [`ColumnGroup`](DataColumn.md#columngroup) 

docs/StardustDocs/topics/readSqlDatabases.md

@@ -88,7 +88,7 @@ Find full example project [here](https://github.com/zaleslaw/KotlinDataFrame-SQL
 To use the latest version of the Kotlin DataFrame library 
 and a specific version of the JDBC driver for your database (MariaDB is used as an example below) in your Notebook, run the following cell.
 
-```jupyter
+```
 %use dataframe
 
 USE {

docs/StardustDocs/topics/schemasImportOpenApiJupyter.md

@@ -2,7 +2,7 @@
 
 <!---IMPORT org.jetbrains.kotlinx.dataframe.samples.api.Schemas-->
 
-Similar to [importing OpenAPI Data Schemas in Gradle projects](schemasGradle.md#openapi-schemas),
+Similar to [importing OpenAPI Data Schemas in Gradle projects](schemasImportOpenApiGradle.md),
 you can also do this in Jupyter Notebooks. 
 
 There is only a slight difference in notation: