Fix links in readme

[jsn5]

Fix links to text detection and text recognition in readme

[frgfm]

Good catch, thanks a lot 🙏

[codecov]

Codecov Report

Merging #937 (8c52d47) into main (75531c5) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #937      +/-   ##
==========================================
+ Coverage   94.71%   94.72%   +0.01%     
==========================================
  Files         134      134              
  Lines        5501     5501              
==========================================
+ Hits         5210     5211       +1     
+ Misses        291      290       -1     

Flag	Coverage Δ
unittests	94.72% <ø> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
doctr/transforms/modules/base.py	94.59% <0.00%> (ø)
doctr/transforms/functional/base.py	97.10% <0.00%> (+1.44%)	⬆️

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[frgfm]

@felixdittrich92 better to edit the commit message next time before merging 😉
Something like "docs: Fixed URLs in README"

[felixdittrich92]

@frgfm we should maybe at a short note about commit messages before merging in the wiki like:
type: short description about the commit wdyt ?

[frgfm]

@felixdittrich92 there is a section in contributing https://github.com/mindee/doctr/blob/main/CONTRIBUTING.md#commits
but perhaps it's too subtle 🤷