Fix blog item page uri

[EvanPalmer]

When creating a new blog page in Foundation a server error occurs. This will fix it as there was an incorrect parameter being passed to the Uri object.

[CLAassistant]

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8 out of 9 committers have signed the CLA.

:white_check_mark: quocanhnguyen402
:white_check_mark: ngocnguyen-epi
:white_check_mark: quantran-epi
:white_check_mark: daniel-isaacs
:white_check_mark: thanhduc-nguyen
:white_check_mark: davidknipe
:white_check_mark: EvanPalmer
:white_check_mark: codeiscool23
:x: Mark Hall

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