Fix miscellaneous oddities around the class reference

doc/classes/MeshInstance3D.xml

@@ -112,7 +112,7 @@
 			<param index="1" name="material" type="Material" />
 			<description>
 				Sets the override [param material] for the specified [param surface] of the [Mesh] resource. This material is associated with this [MeshInstance3D] rather than with [member mesh].
-				[b]Note:[/b] This assigns the [Material] associated to the [MeshInstance3D]'s Surface Material Override properties, not the material within the [Mesh] resource. To set the material within the [Mesh] resource, use [method Mesh.surface_get_material] instead.
+				[b]Note:[/b] This assigns the [Material] associated to the [MeshInstance3D]'s Surface Material Override properties, not the material within the [Mesh] resource. To set the material within the [Mesh] resource, use [method Mesh.surface_set_material] instead.
 			</description>
 		</method>
 	</methods>

platform/web/doc_classes/EditorExportPlatformWeb.xml

@@ -60,15 +60,15 @@
 		</member>
 		<member name="progressive_web_app/icon_144x144" type="String" setter="" getter="">
 			File path to the smallest icon for this web application. If not defined, defaults to the project icon.
-			[b]Note:[/b] If the icon is not 144x144, it will be automatically resized for the final build.
+			[b]Note:[/b] If the icon is not 144×144, it will be automatically resized for the final build.
 		</member>
 		<member name="progressive_web_app/icon_180x180" type="String" setter="" getter="">
 			File path to the small icon for this web application. If not defined, defaults to the project icon.
-			[b]Note:[/b] If the icon is not 180x180, it will be automatically resized for the final build.
+			[b]Note:[/b] If the icon is not 180×180, it will be automatically resized for the final build.
 		</member>
 		<member name="progressive_web_app/icon_512x512" type="String" setter="" getter="">
-			File path to the smallest icon for this web application. If not defined, defaults to the project icon.
-			[b]Note:[/b] If the icon is not 512x512, it will be automatically resized for the final build.
+			File path to the largest icon for this web application. If not defined, defaults to the project icon.
+			[b]Note:[/b] If the icon is not 512×512, it will be automatically resized for the final build.
 		</member>
 		<member name="progressive_web_app/offline_page" type="String" setter="" getter="">
 			The page to display, should the server hosting the page not be available. This page is saved in the client's machine.