Fix the original broken download url of DBP15K

[nxznm]

No description provided.

[codecov]

Codecov Report

Merging #4428 (e276dbb) into master (3486dd9) will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4428      +/-   ##
==========================================
- Coverage   82.69%   82.57%   -0.13%     
==========================================
  Files         312      312              
  Lines       16118    16116       -2     
==========================================
- Hits        13329    13308      -21     
- Misses       2789     2808      +19     

Impacted Files	Coverage Δ
torch_geometric/nn/conv/utils/typing.py	81.25% <0.00%> (-17.50%)	⬇️
torch_geometric/io/tu.py	93.58% <0.00%> (-2.57%)	⬇️
torch_geometric/nn/models/mlp.py	98.41% <0.00%> (-1.59%)	⬇️
torch_geometric/transforms/gdc.py	78.17% <0.00%> (-1.02%)	⬇️
torch_geometric/data/dataset.py	96.80% <0.00%> (-0.80%)	⬇️
torch_geometric/nn/conv/rgat_conv.py	83.76% <0.00%> (-0.53%)	⬇️
torch_geometric/graphgym/utils/comp_budget.py	15.51% <0.00%> (+0.51%)	⬆️

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[rusty1s]

Thank you!