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### Description of defect

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#### Target(s) affected by this defect ?


#### Toolchain(s) (name and version) displaying this defect ?


#### What version of Mbed-os are you using (tag or sha) ?
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    mbed-os-MBED_MAJOR_VERSION.MBED_MINOR_VERSION.MBED_PATCH_VERSION
 
    Master branch is indicated by 'mbed-os-99.99.99
    
    For an issue found on Master please provide the sha being used.
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#### What version(s) of tools are you using. List all that apply (E.g. mbed-cli)


#### How is this defect reproduced ? 



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### Description of defect

<!--
    Add detailed description of what you are reporting.
    Good example: https://os.mbed.com/docs/mbed-os/latest/contributing/workflow.html
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#### Target(s) affected by this defect ?


#### Toolchain(s) (name and version) displaying this defect ?


#### What version of Mbed-os are you using (tag or sha) ?
<!--
    For a released version please provide the release tag (this can be found as per the instructions below)

    mbed-os version can be found in /platform/mbed_version.h. The tag can be reconstructed as follows:
    mbed-os-MBED_MAJOR_VERSION.MBED_MINOR_VERSION.MBED_PATCH_VERSION
 
    Master branch is indicated by 'mbed-os-99.99.99
    
    For an issue found on Master please provide the sha being used.
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#### What version(s) of tools are you using. List all that apply (E.g. mbed-cli)


#### How is this defect reproduced ? 



Change mbed-os version instruction line from uppercase to lowercase
Change mbed-os version instruction line from uppercase to lowercase
