spelling: add 'inheritence'

I regularly forget if inheritance is spelled with an 'a' or an 'e'
and let incorrect spellings get into sdbusplus:

    https://github.com/openbmc/sdbusplus/blob/f0eb650e27103c90536c4bc4ab0b51d186de64a0/include/sdbusplus/server/object.hpp#L168

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I82719095550456979fc4c76831e6996fdfb745d2
diff --git a/dictionary/openbmc-spelling.txt b/dictionary/openbmc-spelling.txt
index 6be99e0..60b6e0e 100644
--- a/dictionary/openbmc-spelling.txt
+++ b/dictionary/openbmc-spelling.txt
@@ -751,6 +751,7 @@
 informtion->information
 infromation->information
 ingore->ignore
+inheritence->inheritance
 inital->initial
 initalized->initialized
 initalised->initialized