Use toctree shortcode for summits

Author: jarrodmillman

content/summits/_index.md

@@ -9,3 +9,5 @@ The summits are recorded and shared on our youtube channel under the
 [“Developer Discussions” playlist](https://www.youtube.com/playlist?list=PL7rNFJDy0iz5GGSmRQNMO-qF6PUG3YsQx).
 
 To discuss upcoming summits or suggest potential summit topics, see the [summits category in the discussion forum](https://discuss.scientific-python.org/c/summits/27).
+
+{{< toctree levels=1 >}}

content/summits/developer/_index.md

@@ -3,3 +3,5 @@ title: "Developer Summits"
 ---
 
 The Developer Summits provide a venue for in-person collaboration on issues that affect the scientific Python ecosystem.
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+{{< toctree levels=1 >}}

content/summits/domain-stacks/_index.md

@@ -10,3 +10,5 @@ Another related set of questions involve what parts of already organized domain
 The summits bring together developers and users of specific domain stacks
 (e.g., [Pangeo](https://pangeo.io/packages.html), [Astropy](https://www.astropy.org/affiliated/index.html), [scikit-hep](https://scikit-hep.org/packages), [scverse](https://scverse.org/projects/), [NIPY](https://nipy.org/))
 to discuss the shortcomings of the current documentation and organization, the needs of various scientific "domain stacks," and to develop a shared roadmap and vision for better documenting and organizing domain stack documentation and organization.
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+{{< toctree levels=1 >}}

content/summits/sparse/_index.md

@@ -11,3 +11,5 @@ Recently, a [sparse array API](https://github.com/scipy/scipy/pull/14822) was ad
 This effort is complimentary to work being done on the [PyData sparse](https://sparse.pydata.org/en/stable/index.html) package, which provides n-dimensional sparse data structures that support array semantics appropriate for Numba compiled code.
 
 The summits bring together developers and users of sparse arrays to discuss shortcomings of the current implementations, the needs of various scientific communities, and to develop a shared roadmap and vision for better supporting sparse arrays.
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+{{< toctree levels=1 >}}