Punctuation fix in import_ca_certificate.md (#113)

The form "it's" means "it is". In this case you need "its", which
means "belonging to it". This is one of those weird oddities of
English that everyone gets wrong:
https://www.merriam-webster.com/grammar/when-to-use-its-vs-its

src/reference/configuration/import_ca_certificate.md

@@ -13,7 +13,7 @@ To use Caido to intercept (and tamper with) your HTTP/S traffic, it is necessary
 
 <img alt="Downloading the CA Certificate." src="/_images/cert_instructions_new.png" center/>
 
-4. Download the certificate and follow the importation instructions provided within Caido. After you've successfully imported the certificate, your browser is now configured to proxy it's traffic through Caido.
+4. Download the certificate and follow the importation instructions provided within Caido. After you've successfully imported the certificate, your browser is now configured to proxy its traffic through Caido.
 
 ::: tip
 Ensure to select the importation instructions specific to your browser of choice.