Update bundled CA certificates

Update the bundled copy of Mozilla's CA certificates to the
latest version.

See: https://github.com/appsignal/integration-guide/blob/main/maintain/updating-bundled-certificates.md

Author: unflxw

.changesets/update-bundled-ca-certificates.md

@@ -0,0 +1,6 @@
+---
+bump: patch
+type: change
+---
+
+Bundled certificates have been updated.