[OOB 5.10] Fix typo

[toyowata]

Description

The tools/test-configs path name should be tools/test_configs.

Pull request type

[x] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Breaking change

[jarlamsa]

Good catch

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3028
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/8016/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Test : FAILURE

Build number : 2798
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8016/2798

[0xc0170]

/morph test

[mbed-ci]

Exporter Build : FAILURE

Build number : 2644
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8016/

[mbed-ci]

Test : SUCCESS

Build number : 2799
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/8016/2799

[0xc0170]

/morph export-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2645
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/8016/