build(docs deps): switch from group to extras for ReadTheDocs

pyproject.toml

@@ -31,6 +31,11 @@ h5py = "^3.7.0"
 numpy = "^1.24.1"
 pooch = "^1.6.0"
 tqdm = "^4.64.1"
+ipython = {version = "^8.8.0", optional = true,extras = ["docs"]}
+myst-parser = {version = "^0.18.1", optional = true, extras = ["docs"]}
+nbsphinx = {version = "^0.8.12", optional = true, extras = ["docs"]}
+sphinx = {version = "^5.3.0", optional = true, extras = ["docs"]}
+sphinx-rtd-theme = {version = "^1.1.1", optional = true, extras = ["docs"]}
 
 [tool.poetry.group.test]
 optional = true
@@ -56,17 +61,6 @@ optional = true
 [tool.poetry.group.dev.dependencies]
 black = {extras = ["jupyter"], version = "^22.12.0"}
 
-
-[tool.poetry.group.docs]
-optional = true
-
-[tool.poetry.group.docs.dependencies]
-ipython = "^8.7.0"
-nbsphinx = "^0.8.10"
-myst-parser = "^0.18.1"
-sphinx = "^5.3.0"
-sphinx-rtd-theme = "^1.1.1"
-
 [tool.poetry.group.release]
 optional = true