Fix deprecated SchemaErrorReport references in docs

[m1so]

No description provided.

[codecov-io]

Codecov Report

Merging #310 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #310   +/-   ##
=======================================
  Coverage   98.64%   98.64%           
=======================================
  Files          18       18           
  Lines        1702     1702           
=======================================
  Hits         1679     1679           
  Misses         23       23           

Impacted Files	Coverage Δ
pandera/decorators.py	100.00% <ø> (ø)
pandera/schema_components.py	98.40% <ø> (ø)
pandera/schemas.py	97.97% <ø> (ø)

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