README.md: Fix MD034 warnings

The following warnings are generated by using markdownlint analysis:
```
MD034/no-bare-urls Bare URL used [Context: "https://github.com/openbmc/doc..."]
```
Refer to markdown-lint [1] to fix MD034
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/034-no-bare-urls.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I6f02c30bc4a2dc93d40bfc2ad78f00f2ea8aa10b
diff --git a/README.md b/README.md
index cf62a34..213b0d8 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 and modify the BIOS setup configuration parameters remotely via BMC at any Host
 state. Modifications to the parameters take place upon the next system reboot or
 immediate based on the host firmware. Please refer
-https://github.com/openbmc/docs/blob/master/designs/remote-bios-configuration.md
+<https://github.com/openbmc/docs/blob/master/designs/remote-bios-configuration.md>
 
 Remote BIOS Configuration (RBC) service exposes D-Bus methods for BIOS settings
 management operations.