fix typo

Author: NikolasK-git

README.md

@@ -38,7 +38,7 @@ modbus-tcp-client-shm [OPTION...]
       --force                 Force the use of the shared memory even if it already exists. Do not use this option per 
                               default! It should only be used if the shared memory of an improperly terminated instance 
                               continues to exist as an orphan and is no longer used.
-  -s, --separate arg          Use a separate shared memory for requests with the specified client id. The the client id 
+  -s, --separate arg          Use a separate shared memory for requests with the specified client id. The client id 
                               (as hex value) is appended to the shared memory prefix (e.g. modbus_fc_DO). You can 
                               specify multiple client ids by separating them with ','. Use --separate-all to generate 
                               separate shared memories for all possible client ids.

src/main.cpp

@@ -164,7 +164,7 @@ int main(int argc, char **argv) {
                           "to exist as an orphan and is no longer used.")
                          ("s,separate",
                           "Use a separate shared memory for requests with the specified client id. "
-                          "The the client id (as hex value) is appended to the shared memory prefix (e.g. modbus_fc_DO)"
+                          "The client id (as hex value) is appended to the shared memory prefix (e.g. modbus_fc_DO)"
                           ". You can specify multiple client ids by separating them with ','. "
                           "Use --separate-all to generate separate shared memories for all possible client ids.",
                           cxxopts::value<std::vector<std::uint8_t>>())