[css-logical] Made headings more consistent (re: w3c#6492) (w3c#6494)

Signed-off-by: Jens Oliver Meiert <jens@meiert.com>

Overriding IPR check as this is a spelling fix.

Author: j9t

css-logical-1/Overview.bs

@@ -457,7 +457,7 @@ and 'max-block-size'/'max-inline-size' properties</h3>
   The mapping depends on the element's 'writing-mode'.
 
 <h3 id="margin-properties">
-Flow-relative Margins:
+Flow-Relative Margins:
 the 'margin-block-start', 'margin-block-end', 'margin-inline-start', 'margin-inline-end' properties and 'margin-block' and 'margin-inline' shorthands</h3>
 
   <pre class="propdef">
@@ -489,7 +489,7 @@ the 'margin-block-start', 'margin-block-end', 'margin-inline-start', 'margin-inl
   If only one value is given, it applies to both the <a>start</a> and <a>end</a> edges.
 
 <h3 id="position-properties">
-Flow-relative Offsets:
+Flow-Relative Offsets:
 the 'inset-block-start', 'inset-block-end', 'inset-inline-start', 'inset-inline-end' properties and 'inset-block', 'inset-inline', and 'inset' shorthands</h3>
 
   The 'top', 'left', 'bottom', 'right' physical properties,
@@ -536,7 +536,7 @@ the 'inset-block-start', 'inset-block-end', 'inset-inline-start', 'inset-inline-
   Values are assigned to its <a>sub-properties</a> as for 'margin'.
 
 <h3 id="padding-properties">
-Flow-relative Padding:
+Flow-Relative Padding:
 the 'padding-block-start', 'padding-block-end', 'padding-inline-start', 'padding-inline-end' properties and 'padding-block' and 'padding-inline' shorthands</h3>
 
   <pre class="propdef">
@@ -569,10 +569,10 @@ the 'padding-block-start', 'padding-block-end', 'padding-inline-start', 'padding
   If only one value is given, it applies to both the <a>start</a> and <a>end</a> edges.
 
 <h3 id="border-properties">
-Flow-relative Borders</h3>
+Flow-Relative Borders</h3>
 
 <h4 id="border-width">
-Flow-relative Border Widths:
+Flow-Relative Border Widths:
 the 'border-block-start-width', 'border-block-end-width', 'border-inline-start-width', 'border-inline-end-width' properties and 'border-block-width' and 'border-inline-width' shorthands</h4>
 
   <pre class="propdef">
@@ -606,7 +606,7 @@ the 'border-block-start-width', 'border-block-end-width', 'border-inline-start-w
 
 
 <h4 id="border-style">
-Flow-relative Border Styles:
+Flow-Relative Border Styles:
 the 'border-block-start-style', 'border-block-end-style', 'border-inline-start-style', 'border-inline-end-style' properties and 'border-block-style' and 'border-inline-style' shorthands</h4>
 
   <pre class="propdef">
@@ -639,7 +639,7 @@ the 'border-block-start-style', 'border-block-end-style', 'border-inline-start-s
   If only one value is given, it applies to both the <a>start</a> and <a>end</a> edges.
 
 <h4 id="border-color">
-Flow-relative Border Colors:
+Flow-Relative Border Colors:
 the 'border-block-start-color', 'border-block-end-color', 'border-inline-start-color', 'border-inline-end-color' properties and 'border-block-color' and 'border-inline-color' shorthands</h4>
 
   <pre class="propdef">
@@ -672,7 +672,7 @@ the 'border-block-start-color', 'border-block-end-color', 'border-inline-start-c
   If only one value is given, it applies to both the <a>start</a> and <a>end</a> edges.
 
 <h4 id="border-shorthands">
-Flow-relative Border Shorthands:
+Flow-Relative Border Shorthands:
 the 'border-block-start', 'border-block-end', 'border-inline-start', 'border-inline-end' properties and 'border-block' and 'border-inline' shorthands</h4>
 
   <pre class="propdef shorthand">
@@ -700,7 +700,7 @@ the 'border-block-start', 'border-block-end', 'border-inline-start', 'border-inl
        see discussion in https://github.com/w3c/csswg-drafts/issues/3519 -->
 
 <h3 id="border-radius-properties">
-Flow-relative Corner Rounding:
+Flow-Relative Corner Rounding:
 the 'border-start-start-radius', 'border-start-end-radius', 'border-end-start-radius', 'border-end-end-radius' properties</h3>
 
   <pre class="propdef">