Fix mismatched brackets in generated .dir-locals.el

This caused Emacs to throw errors when opening files.

Introduced in 3fe3edb.

Author: TomFryersMidsummer

src/etc/rust_analyzer_eglot.el

@@ -28,7 +28,7 @@
                                                                     "--build-dir"
                                                                     "build-rust-analyzer"
                                                                     "--json-output"
-                                                                    "--compile-time-deps"])]
+                                                                    "--compile-time-deps"])
                                         :sysrootSrc "./library"
                                         :extraEnv (:RUSTC_BOOTSTRAP "1"))
                  :rustc ( :source "./Cargo.toml" )))))))