Fix MD033 warnings

The following warnings are generated by using markdownlint analysis:
```
README.md:67:24 MD033/no-inline-html Inline HTML [Element: driver]
README.md:67:33 MD033/no-inline-html Inline HTML [Element: instance]
```
Refer to markdown-lint [1] to fix MD033
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/033-no-inline-html.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: Ib9ede70d1b126910a702b829f8890084b5c3c1e0
diff --git a/README.md b/README.md
index c9ec20b..71d0477 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@
   - Hwmon: The hwmon dir, e.g. `/sys/bus/i2c/devices/3-0069/hwmon/hwmonX/`
   - Debug: The pmbus debug dir, e.g. `/sys/kernel/debug/pmbus/hwmonX/`
   - DeviceDebug: The device debug dir, e.g.
-    '/sys/kernel/debug/<driver>.<instance>/`
+    `/sys/kernel/debug/<driver>.<instance>/`
   - HwmonDeviceDebug: The hwmon device debug dir, e.g.
     `/sys/kernel/debug/pmbus/hwmonX/cffps1/`
 - `fruConfigs` defines the mapping between the attribute file and the FRU