Update tutorials.rst to include multi-temporal use case

Author: smathermather

source/tutorials.rst

@@ -825,6 +825,17 @@ For instance, point clouds properties can be modified to show elevation and also
 Advanced
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+Multi-temporal Datasets
+=======================
+
+When previously mapped sites need revisited, OpenDroneMap can align multiple versions of a dataset through time by using a prior point cloud or digital elevation model. As the prior point cloud `seems to provide better results <https://community.opendronemap.org/t/tips-to-increase-same-site-temporal-consistency/22161/7>`_, that is the approach we will review here.
+
+Steps
+-----
+
+blaa blaa blaa
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+
 Using Singularity
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