Update to version 0.2.0-alpha.10

This update includes a style fix in logo.txt. (https://github.com/rustsbi/rustsbi/pull/23)

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "rustsbi"
 description = "Minimal RISC-V's SBI implementation library in Rust"
-version = "0.2.0-alpha.9"
+version = "0.2.0-alpha.10"
 authors = [
     "Luo Jia <[email protected]>",
     "Campbell He <[email protected]>",