Upgrade ena to 0.14.1.

To get the small performance improvements from
https://github.com/rust-lang/ena/pull/43.

Cargo.lock

@@ -1373,9 +1373,9 @@ dependencies = [
 
 [[package]]
 name = "ena"
-version = "0.14.0"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7402b94a93c24e742487327a7cd839dc9d36fec9de9fb25b09f2dae459f36c3"
+checksum = "b2e5d13ca2353ab7d0230988629def93914a8c4015f621f9b13ed2955614731d"
 dependencies = [
  "log",
 ]

compiler/rustc_data_structures/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 arrayvec = { version = "0.7", default-features = false }
 bitflags = "1.2.1"
 cfg-if = "1.0"
-ena = "0.14"
+ena = "0.14.1"
 indexmap = { version = "1.9.1" }
 jobserver_crate = { version = "0.1.13", package = "jobserver" }
 libc = "0.2"