[css-fonts] user agents, not users agents

Replaced "users agents" with "user agents"

Author: ericwilligers

css-fonts-3/Fonts.html

@@ -3375,7 +3375,7 @@ <h3 id=font-style-matching><span class=secno>5.2. </span>Matching font
       and oblique faces must be distinguished using the value of the <a
       href="#descdef-font-style" title="font-style!!descriptor">‘<code
       class=property>font-style</code>’</a> descriptor. For families that
-      lack any italic or oblique faces, users agents may create artificial
+      lack any italic or oblique faces, user agents may create artificial
       oblique faces, if this is permitted by the value of the ‘<a
       href="#propdef-font-synthesis"><code
       class=property>font-synthesis</code></a>’ property.

css-fonts-3/Fonts.src.html

@@ -2468,7 +2468,7 @@ <h3 id="font-style-matching">Matching font styles</h3>
     families defined via <code>@font-face</code> rules, italic and oblique
     faces must be distinguished using the value of the
     <span title="font-style!!descriptor">'font-style'</span> descriptor.
-    For families that lack any italic or oblique faces, users agents
+    For families that lack any italic or oblique faces, user agents
     may create artificial oblique faces, if this is permitted by the
     value of the 'font-synthesis' property.
     </li>

css-fonts-3/Overview-wip.bs

@@ -2044,7 +2044,7 @@ style properties were set to their initial value.
 			families defined via ''@font-face'' rules, italic and oblique
 			faces must be distinguished using the value of the
 			'font-style' descriptor.
-			For families that lack any italic or oblique faces, users agents
+			For families that lack any italic or oblique faces, user agents
 			may create artificial oblique faces, if this is permitted by the
 			value of the 'font-synthesis' property.
 

css-fonts-3/Overview.html

@@ -1983,7 +1983,7 @@ <h3 class="heading settled" data-level=5.2 id=font-style-matching><span class=se
 families defined via <a class=css data-link-type=maybe href=#at-ruledef-font-face title=@font-face>@font-face</a> rules, italic and oblique
 faces must be distinguished using the value of the
 <a class=property data-link-type=propdesc href=#propdef-font-style title=font-style>font-style</a> descriptor.
-For families that lack any italic or oblique faces, users agents
+For families that lack any italic or oblique faces, user agents
 may create artificial oblique faces, if this is permitted by the
 value of the <a class=property data-link-type=propdesc href=#propdef-font-synthesis title=font-synthesis>font-synthesis</a> property.</p>
 

css-fonts-4/Overview.bs

@@ -2491,7 +2491,7 @@ if all font style properties were set to their initial value.
 				faces must be distinguished using the value of the
 				'font-style' descriptor.
 
-				For families that lack any italic or oblique faces, users agents
+				For families that lack any italic or oblique faces, user agents
 				may create artificial oblique faces, if this is permitted by the
 				value of the 'font-synthesis' property.