Fixed url prop bug for <ReactDisqusComments />

[vzhou842]

The url prop being passed into ReactDisqusComments is wrong - both siteUrl and postSlug are undefined:

• siteUrl should actually be named url, see the graphql in post-template
• postSlug is not included in the graphql for post-template and is thus undefined

This prop fixes those two values so now the URL is correct. I tested this on my own site (which is based on this starter project) and it works great!

[codecov]

Codecov Report

Merging #95 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #95   +/-   ##
=======================================
  Coverage   95.71%   95.71%           
=======================================
  Files          28       28           
  Lines         140      140           
  Branches        8        8           
=======================================
  Hits          134      134           
  Misses          6        6

Impacted Files	Coverage Δ
src/templates/post-template.js	100% <ø> (ø)	⬆️
src/components/Post/Comments/Comments.js	75% <ø> (ø)	⬆️

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[vzhou842]

@alxshelepenok just wanted to ping and see if you've seen this? I feel like it's a pretty important PR to merge given that without it Disqus doesn't work in this template. I'm already using this fix live on my blog and it works great for me.

[alxshelepenok]

@vzhou842 yes i saw it
#86 also includes such changes. But of course you don't need to close.

[vzhou842]

ok gotcha