Trailing slash results in 404 page (#1767)

Noticed that when going to https://fluentassertions.com/introduction/ I get a 404-page in response. If I remove the trailing slash it works.
I guess the best solution is to make it work with and without trailing slash but this is at least one way of making the Issue template not pointing to a 404-page.

ISSUE_TEMPLATE.md

@@ -3,7 +3,7 @@
 * Tried upgrading to newest version of Fluent Assertions, to see if your issue has already been resolved and released?
 * Checked existing open *and* closed [issues](https://github.com/fluentassertions/fluentassertions/issues?utf8=%E2%9C%93&q=is%3Aissue), to see if the issue has already been reported?
 * Tried reproducing your problem in a new isolated project?
-* Read the [documentation](https://fluentassertions.com/introduction/)?
+* Read the [documentation](https://fluentassertions.com/introduction)?
 * Considered if this is a general question and not a bug?. For general questions please use [StackOverflow](https://stackoverflow.com/questions/tagged/fluent-assertions?mixed=1).
 
 ### Description
@@ -43,4 +43,4 @@ result.Should().Be('M');
 
 ### Additional Information
 
-Any additional information, configuration or data that might be necessary to reproduce the issue.
+Any additional information, configuration or data that might be necessary to reproduce the issue.