[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

docs/contributing.md

@@ -1,4 +1,5 @@
 # Contributing guide
+
 This guide is written for:
 
 - **spatial technology companies** that would like to add a reader for a new product, support a new version of an existing technology, or contribute with edits/bugfixes to one of the available readers
@@ -12,24 +13,36 @@ The rest of the document will be specific to `spatialdata-io`.
 ## Adding a new reader
 
 ### The reader file
+
 ### Separating the constants from the reader logic
 
 ## Adding tests: small data vs real data
+
 ### When small test datasets are available
+
 ### When only real (large) data is available
+
 #### The `download.py` script
+
 #### The `to_zarr.py` script
 
 ## What to test
+
 ### Testing multiple versions
+
 ### Testing plotting capabilities
+
 ### Testing data integrity
+
 ### Testing auxiliary functions
 
 ## Bug tracking
+
 - tracking bugs also outside spatialdata-io
 - tracking bugs also in spatialdata
 
 # Limitations
+
 ## Unsupported technologies
-## Naming constistency across readers
+
+## Naming constistency across readers