chore: fix some typos in comments (#385)

Signed-off-by: toofooboo <cmaker@foxmail.com>

README.md

@@ -166,7 +166,7 @@ This template defines some new variables to control the appearance of the result
 
   - `footnotes-disable-backlinks` (defaults to `false`)
 
-    disables making the reference from the footnote at the bottom of the page into a link back to the occurence of the footnote in the main text (enabling requires package `footnotebackref`).
+    disables making the reference from the footnote at the bottom of the page into a link back to the occurrence of the footnote in the main text (enabling requires package `footnotebackref`).
 
   - `book` (defaults to `false`)
 

docs/index.md

@@ -132,7 +132,7 @@ This template defines some new variables to control the appearance of the result
 
   - `footnotes-disable-backlinks` (defaults to `false`)
 
-    disables making the reference from the footnote at the bottom of the page into a link back to the occurence of the footnote in the main text (enabling requires package `footnotebackref`).
+    disables making the reference from the footnote at the bottom of the page into a link back to the occurrence of the footnote in the main text (enabling requires package `footnotebackref`).
 
   - `book` (defaults to `false`)
 

examples/boxes-with-pandoc-latex-environment-and-awesomebox/document.md

@@ -21,7 +21,7 @@ pandoc-latex-environment:
 
 # Boxes with `pandoc-latex-environment` and `awesomebox`
 
-This example demonstrates the use of the filter [`pandoc-latex-environments`] to create custom boxes with the [`awesomebox`] package. *pandoc-latex-environment* is a pandoc filter for adding LaTeX environement on specific HTML div tags.
+This example demonstrates the use of the filter [`pandoc-latex-environments`] to create custom boxes with the [`awesomebox`] package. *pandoc-latex-environment* is a pandoc filter for adding LaTeX environment on specific HTML div tags.
 
 
 ## Box Types

examples/boxes-with-pandoc-latex-environment-and-tcolorbox/document.md

@@ -26,7 +26,7 @@ pandoc-latex-environment:
 
 This example demonstrates the use of the filter [`pandoc-latex-environments`]
 to create custom boxes with the [`tcolorbox`] package.
-*pandoc-latex-environment* is a pandoc filter for adding LaTeX environement on
+*pandoc-latex-environment* is a pandoc filter for adding LaTeX environment on
 specific HTML div tags. For a list of all available options visit the
 [`tcolorbox` documentation](https://ctan.org/pkg/tcolorbox).