Fix line numbers in stack trace example

Updated stack trace example lines in README.

Author: gammasoft71

examples/xtd.core.examples/environment/environment_stack_trace/README.md

@@ -20,8 +20,8 @@ xtdc run
 ```
 environment::stack_trace:
    at xtd::environment::stack_trace() [0x00002C20] in !---OMITTED---!/environment.cpp:line 255
-   at test3() [0x00002B40] in !---OMITTED---!/environment_stack_trace.cpp:line 7
-   at test2() [0x00002CA0] in !---OMITTED---!/environment_stack_trace.cpp:line 11
-   at test1() [0x00002CB0] in !---OMITTED---!/environment_stack_trace.cpp:line 15
-   at main [0x00002CC0] in !---OMITTED---!/environment_stack_trace.cpp:line 20
+   at test3() [0x00002B40] in !---OMITTED---!/environment_stack_trace.cpp:line 5
+   at test2() [0x00002CA0] in !---OMITTED---!/environment_stack_trace.cpp:line 9
+   at test1() [0x00002CB0] in !---OMITTED---!/environment_stack_trace.cpp:line 13
+   at main [0x00002CC0] in !---OMITTED---!/environment_stack_trace.cpp:line 17
 ```