Fix typos in GitHub Pages around Jekyll

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

content/github/working-with-github-pages/about-github-pages-and-jekyll.md

@@ -27,7 +27,7 @@ versions:
 
 Jekyll is a static site generator with built-in support for {% data variables.product.prodname_pages %} and a simplified build process. Jekyll takes Markdown and HTML files and creates a complete static website based on your choice of layouts. Jekyll supports Markdown and Liquid, a templating language that loads dynamic content on your site. For more information, see [Jekyll](https://jekyllrb.com/).
 
-Jekyll is not officially supported for Windows. For more information, see "[Jekyll on Windows](http://jekyllrb.com/docs/windows/#installation)" in the Jekyll documenation.
+Jekyll is not officially supported for Windows. For more information, see "[Jekyll on Windows](http://jekyllrb.com/docs/windows/#installation)" in the Jekyll documentation.
 
 We recommend using Jekyll with {% data variables.product.prodname_pages %}. If you prefer, you can use other static site generators or customize your own build process locally or on another server. For more information, see "[About {% data variables.product.prodname_pages %}](/articles/about-github-pages#static-site-generators)."
 

content/github/working-with-github-pages/setting-a-markdown-processor-for-your-github-pages-site-using-jekyll.md

@@ -13,7 +13,7 @@ versions:
 
 People with write permissions for a repository can set the Markdown processor for a {% data variables.product.prodname_pages %} site.
 
-{% data variables.product.prodname_pages %} supports two Markdown processors: [kramdown](http://kramdown.gettalong.org/) and {% data variables.product.prodname_dotcom %}'s own extended [CommonMark](https://commonmark.org/) processer, which is used to render {% data variables.product.prodname_dotcom %} Flavored Markdown throughout {% data variables.product.product_name %}. For more information, see "[About writing and formatting on {% data variables.product.prodname_dotcom %}](/articles/about-writing-and-formatting-on-github)."
+{% data variables.product.prodname_pages %} supports two Markdown processors: [kramdown](http://kramdown.gettalong.org/) and {% data variables.product.prodname_dotcom %}'s own extended [CommonMark](https://commonmark.org/) processor, which is used to render {% data variables.product.prodname_dotcom %} Flavored Markdown throughout {% data variables.product.product_name %}. For more information, see "[About writing and formatting on {% data variables.product.prodname_dotcom %}](/articles/about-writing-and-formatting-on-github)."
 
 You can use {% data variables.product.prodname_dotcom %} Flavored Markdown with either processor, but only our CommonMark processor will always match the results you see on {% data variables.product.product_name %}.