extends the .gitignore for cert and ssh (#2572)

# Description

Please provide a summary of the changes, including relevant motivation
and context.

Closes #(issue_number)

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [x] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

.gitignore

@@ -146,16 +146,34 @@ out/
 # cucumber
 /cucumber/reports/**
 
-# Certs
+# Certs and Security Files
 *.p12
+*.pk8
 *.pem
 *.crt
 *.cer
+*.cert
 *.der
 *.key
 *.csr
+*.kdbx
+*.jks
+*.asc
+
+# SSH Keys
+*.pub
+*.priv
+id_rsa
+id_rsa.pub
+id_ecdsa
+id_ecdsa.pub
+id_ed25519
+id_ed25519.pub
+.ssh/
+*ssh
 
 # cache
+.cache
 .ruff_cache
 .mypy_cache
 .pytest_cache