ci: add option to run workflows manually (#223)

* ci: add option to run workflows manually

This results in a "Run workflow" button on the Actions page. See the
docs for [`workflow_dispatch`].

[`workflow_dispatch`]: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch

* fingerprint: upgrade `sysinfo` library

This change upgrades the `sysinfo` library to `0.28` to avoid
compilation issues on Windows due to an unaligned packed field (e.g.,
this [failure]). `sysinfo`'s API has changed slightly and this brings
Sightglass' usage up to speed.

[failure]: https://github.com/bytecodealliance/sightglass/actions/runs/4089163019/jobs/7051580568#step:6:459

.github/workflows/benchmarks.yml

@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch:
 
 env:
   CARGO_TERM_COLOR: always

.github/workflows/sightglass.yml

@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch:
 
 env:
   CARGO_TERM_COLOR: always

crates/fingerprint/Cargo.toml

@@ -15,4 +15,4 @@ regex = "1.5"
 serde = { version = "1.0.136", features = ["derive"] }
 sha2 = "0.10"
 sightglass-build = { path = "../build" }
-sysinfo = "0.23"
+sysinfo = "0.28"

crates/fingerprint/src/machine.rs

@@ -2,7 +2,7 @@ use crate::hash;
 use anyhow::{anyhow, Result};
 use serde::{Deserialize, Serialize};
 use std::env;
-use sysinfo::{ProcessorExt, System, SystemExt};
+use sysinfo::{CpuExt, System, SystemExt};
 
 /// Describes a fingerprinted system.
 ///
@@ -49,7 +49,7 @@ impl Machine {
         // Gather some CPU information.
         let arch = std::env::consts::ARCH.to_string();
         sys.refresh_cpu();
-        let cpu = sys.global_processor_info().brand().to_string();
+        let cpu = sys.global_cpu_info().brand().to_string();
 
         // Gather the memory information. The expected result should be in GiB (the 1024-base SI
         // measurement commonly used for memory) but it is unclear whether `sysinfo` is returning KB