Api Key Leaks: Add Trivy to tools section

[mschader]

This will add Trivy to the tools section of the topic Api Key Leaks. This is currently my go-to tool to scan docker images or repositories for secrets and therefore should be mentioned. As I could not see it mentioned somewhere, I picked this topic as it seemed to fit best. But it might also fit for other topics such as scanning for vulnerable dependencies (CVE) used in a projects or weaknesses in regards of SBOM/IaC. If you see a better fit for Trivy at other topics or might want to add it redundantly multiple times I guess we could add it to this MR.
Let me know what you think. :)

(Also changed the phrasing for two other tools as their main repository uses the upper/lowecase as changed which should not require a separate MR)

[mschader]

Well, it might shall not be mentioned because it is my go-to tool but because it is also a really nice tool :D