ord: fix typo in doc

Signed-off-by: Peter Gadfort <[email protected]>

Author: gadfort

src/README.md

@@ -116,7 +116,7 @@ add_global_connection -net net_name \
                       [-inst_pattern inst_regular_expression] \
                       -pin_pattern pin_regular_expression \
                       (-power|-ground) \
-                      [-reigon region_name]
+                      [-region region_name]
 ```
 
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