Minor fix to ensure virtual angles are returned in correct shape

[a-r-j]

Reference Issues/PRs

What does this implement/fix? Explain your changes

What testing did you do to verify the changes in this PR?

Pull Request Checklist

• Added a note about the modification or contribution to the ./CHANGELOG.md file (if applicable)
• Added appropriate unit test functions in the ./graphein/tests/* directories (if applicable)
• Modify documentation in the corresponding Jupyter Notebook under ./notebooks/ (if applicable)
• Ran python -m py.test tests/ and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., python -m py.test tests/protein/test_graphs.py)
• Checked for style issues by running black . and isort .

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-commenter]

Codecov Report

Patch coverage: 39.95% and project coverage change: +3.66 🎉

Comparison is base (8123f42) 40.27% compared to head (fc7657e) 43.93%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #315      +/-   ##
==========================================
+ Coverage   40.27%   43.93%   +3.66%     
==========================================
  Files          48      113      +65     
  Lines        2811     7788    +4977     
==========================================
+ Hits         1132     3422    +2290     
- Misses       1679     4366    +2687     

Impacted Files	Coverage Δ
graphein/ml/datasets/foldcomp_dataset.py	0.00% <0.00%> (ø)
graphein/ml/diffusion.py	0.00% <0.00%> (ø)
graphein/ml/metrics/__init__.py	0.00% <0.00%> (ø)
graphein/ml/metrics/gdt.py	0.00% <0.00%> (ø)
graphein/ml/metrics/tm_score.py	0.00% <0.00%> (ø)
graphein/ppi/graph_metadata.py	0.00% <0.00%> (ø)
graphein/ppi/visualisation.py	0.00% <0.00%> (ø)
graphein/protein/analysis.py	0.00% <0.00%> (ø)
graphein/protein/features/utils.py	27.77% <0.00%> (ø)
graphein/protein/folding_utils.py	0.00% <0.00%> (ø)
... and 95 more

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