Update branding from PA to USA nationwide

Author: ZacharyLeahan

src/components/Header.vue

@@ -22,7 +22,7 @@
             <router-link to="/how-to-use">How to Use</router-link>
             <router-link to="/map">Nurseries</router-link>
           </span>
-          <div class="copyright">© 2025 Choose Native Plants - PA</div>
+          <div class="copyright">© 2025 Choose Native Plants - USA</div>
         </menu>
       </div>
       <slot name="before-bar"></slot>

src/components/HowToUsePage.vue

@@ -247,7 +247,7 @@
         or cookies are used. By using these features you consent to the collection
         of this information.
       </p>
-      <p>© 2025 Choose Native Plants - PA</p>
+      <p>© 2025 Choose Native Plants - USA</p>
     </article>
     <Up />
     <div class="tone">