fix: update version.txt and version.go to 1.24.2

The changelog skill missed updating these files because it derived
the version from the unreleased header (1.25.0-beta.1) instead of
using the version specified in the issue (1.24.2).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rajeshkamal5050

cli/azd/pkg/azdext/version.go

@@ -6,4 +6,4 @@ package azdext
 // Version is the semantic version of the azdext SDK package.
 // This value mirrors the CLI version in cli/version.txt and is
 // automatically updated by eng/scripts/Update-CliVersion.ps1.
-const Version = "1.25.0-beta.1"
+const Version = "1.24.2"

cli/version.txt

@@ -1 +1 @@
-1.25.0-beta.1
+1.24.2