chore(deps): update rust crate httpmock to ^0.8.0

Author: renovate[bot]

openstack_sdk/Cargo.toml

@@ -79,7 +79,7 @@ webauthn-authenticator-rs = { workspace = true, optional = true }
 webauthn-rs-proto = { workspace = true, optional = true }
 
 [dev-dependencies]
-httpmock = "^0.7"
+httpmock = "^0.8.0"
 reserve-port = "^2.2"
 tempfile = { workspace = true }
 tracing-test = { version = "^0.2" }