Refine CEF installer artifact detection logic in app update process

- Updated isCefInstallerArtifact function to use a regex pattern for identifying CEF installer artifacts, improving accuracy in artifact name matching.
- Enhanced comments for clarity on CEF build naming conventions, aiding future maintenance and understanding of the code.

public/appupdate.js

@@ -25,6 +25,12 @@ let runningUpdate = null
 const getArtifactName = (artifact) =>
   String(artifact?.fileName || artifact?.relativePath || artifact?.url || '')
 
+const isCefInstallerArtifact = (artifact) => {
+  const name = getArtifactName(artifact).toLowerCase()
+  // CEF builds are named like farmcontrol-0.1.1-x64-cef.msi / -cef.pkg / -cef.exe
+  return /-cef\.[a-z0-9]+$/.test(name)
+}
+
 const normalizeArch = (arch) => {
   if (arch === 'x64' || arch === 'amd64') return 'x64'
   if (arch === 'arm64' || arch === 'aarch64') return 'arm64'
@@ -69,7 +75,9 @@ const selectUpdateArtifact = (
     throw new Error(`App updates are not supported on ${platform}.`)
   }
 
-  const artifacts = Array.isArray(update?.artifacts) ? update.artifacts : []
+  const artifacts = (Array.isArray(update?.artifacts) ? update.artifacts : []).filter(
+    (artifact) => !isCefInstallerArtifact(artifact)
+  )
   const matchingArtifact = artifacts.find((artifact) =>
     artifactMatchesPlatform(artifact, target, platform, arch)
   )