Fix how-to guide documentation references.

- Remove redundant Python 3.10 tabs from using_task_returns.md (3 instances)
- Remove redundant Python 3.10 tabs from writing_custom_nodes.md (3 instances)
- Rename Python 3.10+ tabs to Annotated in both files

Author: tobiasraabe

docs/source/how_to_guides/using_task_returns.md

@@ -18,21 +18,14 @@ defines where the return of the function, a string, should be stored.
 
 `````{tab-set}
 
-````{tab-item} Python 3.10+
-:sync: python310plus
+````{tab-item} Annotated
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_1_py310.py
 ```
 
 ````
 
-````{tab-item} Python 3.10
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_1_py38.py
-```
-
-````
 `````
 
 It works because internally the path is converted to a {class}`pytask.PathNode` that is
@@ -60,22 +53,14 @@ of the previous interfaces.
 
 `````{tab-set}
 
-````{tab-item} Python 3.10+
-:sync: python310plus
+````{tab-item} Annotated
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_3_py310.py
 ```
 
 ````
 
-````{tab-item} Python 3.10
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_3_py38.py
-```
-
-````
-
 ````{tab-item} @pytask.task
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_3_task.py
@@ -95,22 +80,14 @@ mapped to the defined nodes.
 
 `````{tab-set}
 
-````{tab-item} Python 3.10+
-:sync: python310plus
+````{tab-item} Annotated
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_4_py310.py
 ```
 
 ````
 
-````{tab-item} Python 3.10
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_4_py38.py
-```
-
-````
-
 ````{tab-item} @pytask.task
 
 ```{literalinclude} ../../../docs_src/how_to_guides/using_task_returns_example_4_task.py

docs/source/how_to_guides/writing_custom_nodes.md

@@ -26,37 +26,22 @@ The result will be the following task.
 
 `````{tab-set}
 
-````{tab-item} Python 3.10+
-:sync: python310plus
+````{tab-item} Annotated
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py310.py
 ```
 
 ````
 
-````{tab-item} Python 3.10+ & Return
-:sync: python310plus
+````{tab-item} Annotated & Return
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py310_return.py
 ```
 
 ````
 
-````{tab-item} Python 3.10
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py38.py
-```
-
-````
-
-````{tab-item} Python 3.10 & Return
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_2_py38_return.py
-```
-
-````
 `````
 
 ## Nodes
@@ -79,21 +64,14 @@ we arrive at the following class.
 
 `````{tab-set}
 
-````{tab-item} Python 3.10+
-:sync: python310plus
+````{tab-item} Annotated
+:sync: annotated
 
 ```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_3_py310.py
 ```
 
 ````
 
-````{tab-item} Python 3.10
-:sync: python38plus
-
-```{literalinclude} ../../../docs_src/how_to_guides/writing_custom_nodes_example_3_py38.py
-```
-
-````
 `````
 
 Here are some explanations.