Update wp_register_service_worker_caching_route() to reflect change to underlying register method

[westonruter]

This rectifies something that I missed in #338.

[codecov-io]

Codecov Report

Merging #424 (2201897) into develop (a16e493) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             develop     #424   +/-   ##
==========================================
  Coverage      24.19%   24.19%           
  Complexity       364      364           
==========================================
  Files             55       55           
  Lines           1872     1872           
==========================================
  Hits             453      453           
  Misses          1419     1419           

Flag	Coverage Δ	Complexity Δ
php	24.19% <0.00%> (ø)	0.00 <0.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...ponents/class-wp-service-worker-caching-routes.php	72.26% <ø> (ø)	39.00 <0.00> (ø)
wp-includes/service-workers.php	21.15% <0.00%> (ø)	0.00 <0.00> (ø)

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[codecov-commenter]

Codecov Report

Merging #424 (fb6f74b) into develop (cb40420) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             develop     #424   +/-   ##
==========================================
  Coverage      23.25%   23.25%           
  Complexity       364      364           
==========================================
  Files             56       56           
  Lines           1948     1948           
==========================================
  Hits             453      453           
  Misses          1495     1495           

Flag	Coverage Δ
php	23.25% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ponents/class-wp-service-worker-caching-routes.php	72.26% <ø> (ø)
wp-includes/service-workers.php	21.15% <0.00%> (ø)

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cb40420...fb6f74b. Read the comment docs.

[pooja-muchandikar]

QA Passed ✅

On registering new plugin with following code was able to register service worker caching route.

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