.strong, not .Strong

#24537 (comment)

Author: IOKG04

doc/langref.html.in

@@ -4840,7 +4840,7 @@ fn cmpxchgWeakButNotAtomic(comptime T: type, ptr: *T, expected_value: T, new_val
       <p>
       This builtin can be called from a {#link|comptime#} block to conditionally export symbols.
       When <code>ptr</code> points to a function with the C calling convention and
-      {#syntax#}options.linkage{#endsyntax#} is {#syntax#}.Strong{#endsyntax#}, this is equivalent to
+      {#syntax#}options.linkage{#endsyntax#} is {#syntax#}.strong{#endsyntax#}, this is equivalent to
       the {#syntax#}export{#endsyntax#} keyword used on a function:
       </p>
       {#code|export_builtin.zig#}