fix(style): slight tweak to spacing of star in header (#102499)

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Spacing of star was off in header on Dashboard page. Adjusted to align
star in header with star in the rows below.

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Author: marthalyndon

static/app/views/dashboards/manage/dashboardTable.tsx

@@ -391,5 +391,5 @@ const StyledButton = styled(Button)`
 `;
 
 const StyledIconStar = styled(IconStar)`
-  margin-left: ${space(0.25)};
+  margin-left: ${space(0.75)};
 `;