update tutorials

[codecov[bot]]

Codecov Report

Merging #245 (b3d40f3) into master (faed3fa) will decrease coverage by 0.21%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #245      +/-   ##
==========================================
- Coverage   80.85%   80.64%   -0.22%     
==========================================
  Files          17       17              
  Lines        1698     1731      +33     
==========================================
+ Hits         1373     1396      +23     
- Misses        325      335      +10     

Impacted Files	Coverage Δ
src/GNNGraphs/gnngraph.jl	55.11% <0.00%> (-1.44%)	:arrow_down:
src/GNNGraphs/gnnheterograph.jl	23.94% <0.00%> (-1.06%)	:arrow_down:
src/GNNGraphs/datastore.jl	72.72% <0.00%> (-0.53%)	:arrow_down:
src/GNNGraphs/transform.jl	96.12% <0.00%> (-0.38%)	:arrow_down:
src/layers/conv.jl	76.78% <0.00%> (-0.07%)	:arrow_down:
src/GNNGraphs/generate.jl	100.00% <0.00%> (ø)
src/GNNGraphs/sampling.jl	100.00% <0.00%> (ø)
src/GNNGraphs/query.jl	94.02% <0.00%> (+0.09%)	:arrow_up:
src/GNNGraphs/convert.jl	91.82% <0.00%> (+0.32%)	:arrow_up:
src/GNNGraphs/utils.jl	75.40% <0.00%> (+0.61%)	:arrow_up:
... and 1 more

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[Dsantra92]

Unless we cache the rendered files, the docs will take this ridiculous time for rendering.