Fix typos in changelog

Author: phil-opp

Changelog.md

@@ -1,6 +1,6 @@
-Implement boot-info-address ([#101](https://github.com/rust-osdev/bootloader/pull/101))
+- Implement boot-info-address ([#101](https://github.com/rust-osdev/bootloader/pull/101))
 
-# 0.8.0
+# 0.8.8
 
 - Add basic support for ELF thread local storage segments ([#96](https://github.com/rust-osdev/bootloader/pull/96))