chore(dependencies): use version 9.0.83 of tomcat to fix CVE-2023-46589…

… (#1155)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

spinnaker-dependencies/spinnaker-dependencies.gradle

@@ -28,11 +28,11 @@ ext {
  springfoxSwagger : "3.0.0",
  swagger : "1.5.20", //this should stay in sync with what springfoxSwagger expects.
 
- // Spring boot 2.4.13 brings in 9.0.55. Spring boot 2.5.14 brings in
- // 9.0.63. Use 9.0.69 to resolve CVE-2022-42252 and CVE-2022-45143. Spring
- // boot 2.6.14 and 2.7.6 bring in 9.0.69.
- // https://tomcat.apache.org/security-9.html for latest security fixes
- tomcat : "9.0.81"
+ // Spring boot 2.5.15 and 2.6.15 bring in 9.0.75. 2.7.18
+ // brings in 9.0.83, which fixes all CVEs to date (20-feb-24).
+ //
+ // See https://tomcat.apache.org/security-9.html for latest security fixes.
+ tomcat : "9.0.83"
  ]
 }