Fix revalidateTimings route for catchall index route (#65843) #5260

Job	Run time
build-wasm (web)	24s
stable - x86_64-apple-darwin - node@16	36s
build-wasm (nodejs)	22s
build	1m 49s
stable - aarch64-apple-darwin - node@16	31s
stable - x86_64-pc-windows-msvc - node@16	1m 32s
stable - i686-pc-windows-msvc - node@16	1m 41s
stable - aarch64-pc-windows-msvc - node@16	1m 15s
stable - x86_64-unknown-linux-gnu - node@16	1m 1s
stable - x86_64-unknown-linux-musl - node@16	1m 12s
stable - aarch64-unknown-linux-gnu - node@16	1m 9s
stable - aarch64-unknown-linux-musl - node@16	1m 4s
Deploy examples	54s
Deploy tarball	1m 50s
Upload Turbopack Bytesize metrics to Datadog	37s
Potentially publish release	0s
Release Stats	0s
	15m 57s

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