Fixes : #4273 Add link to user guide in About

[Rishavgupta12345]

Fixes: #4273 Add a link to the user guide in About

screen short:

[Rishavgupta12345]

Tests added @madhurgupta10 @4D17Y4

[codecov]

Codecov Report

Merging #4882 (9d959d3) into master (824a82a) will increase coverage by 0.25%.
The diff coverage is 65.45%.

❗ Current head 9d959d3 differs from pull request most recent head 2e92669. Consider uploading reports for the commit 2e92669 to get more accurate results

@@             Coverage Diff              @@
##             master    #4882      +/-   ##
============================================
+ Coverage     50.34%   50.59%   +0.25%     
- Complexity     2210     2230      +20     
============================================
  Files           338      338              
  Lines         15558    15603      +45     
  Branches       1360     1370      +10     
============================================
+ Hits           7832     7895      +63     
+ Misses         7141     7112      -29     
- Partials        585      596      +11     

Impacted Files	Coverage Δ
...ommons/customselector/ui/selector/ImageFragment.kt	57.14% <0.00%> (-2.86%)	⬇️
...mmons/customselector/ui/selector/FolderFragment.kt	68.18% <20.00%> (-6.18%)	⬇️
...r/free/nrw/commons/contributions/MainActivity.java	74.72% <60.00%> (-1.28%)	⬇️
...ava/fr/free/nrw/commons/review/ReviewActivity.java	57.34% <70.58%> (+10.05%)	⬆️
...r/free/nrw/commons/explore/media/MediaConverter.kt	71.11% <75.00%> (-0.32%)	⬇️
...r/free/nrw/commons/review/ReviewImageFragment.java	31.68% <80.00%> (+5.87%)	⬆️
...c/main/java/fr/free/nrw/commons/AboutActivity.java	74.39% <100.00%> (+1.31%)	⬆️
app/src/main/java/fr/free/nrw/commons/Media.kt	57.89% <100.00%> (+1.13%)	⬆️
...a/fr/free/nrw/commons/review/ReviewController.java	79.06% <0.00%> (-4.66%)	⬇️
... and 9 more

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[4D17Y4]

LGTM

[Rishavgupta12345]

unit tests added @madhurgupta10 @4D17Y4

[Rishavgupta12345]

as it is approved so please merge it

[4D17Y4]

Thanks @Rishavgupta12345