Fix resource utilization variable name in Keras tutorial

[samuel-wj-chapman]

Pull Request Description:

variable fix, line 299

Checklist before requesting a review:

• I set the appropriate labels on the pull request.
• I have added/updated the release note draft (if necessary).
• I have updated the documentation to reflect my changes (if necessary).
• All function and files are well documented.
• All function and classes have type hints.
• There is a licenses in all file.
• The function and variable names are informative.
• I have checked for code duplications.
• I have added new unittest (if necessary).

[ofirgo]

Can you specify which variable you fixed? It is complicated to understand it the way the .ipynb file is shown.
In general, the PR title should include meaningful content (it will probably appear as the commit message when you'll merge it so the commit message also should be meaningful)

[samuel-wj-chapman]

notebook was failing due to a naming mistake.

just one line changed

"    target_ResourceUtilization=ResourceUtilization,\n",

changed to
" target_resource_utilization=resource_utilization,\n",

i am unsure why so much has flagged as changed between the two notebooks sorry if that added confusion

[ofirgo]

notebook was failing due to a naming mistake.

just one line changed

"    target_ResourceUtilization=ResourceUtilization,\n",

changed to " target_resource_utilization=resource_utilization,\n",

i am unsure why so much has flagged as changed between the two notebooks sorry if that added confusion

All good, I meant just edit the PR title so it would be informative.
I edited it now, you can see what I meant.