docs: fix typo in see also section (bootstrap-vue#1527)

shadforth · pi0 · commit f5c36df42cda · 2018-01-13T16:26:30.000+03:30
diff --git a/src/components/button-group/README.md b/src/components/button-group/README.md
@@ -105,7 +105,7 @@ that split dropdown menus are not supported when prop `vertical` is set.
 `<b-button-group>` can also be used by its shorter alias `<b-btn-group>`.
 
 ## See also
-Also check out the [`<b-button-toolabr>`](./button-toolbar) component for generating
+Also check out the [`<b-button-toolbar>`](./button-toolbar) component for generating
 toolbars containing button groups and input groups.
 
 
