Use form font weight variable

Author: janfaracik

war/src/main/less/abstracts/theme.less

@@ -275,7 +275,7 @@
   --form-item-max-width: ~"min(65vw, 1600px)";
   --form-item-max-width--medium: ~"min(50vw, 1400px)";
   --form-item-max-width--small: ~"min(35vw, 1200px)";
-  --form-label-font-weight: 600;
+  --form-label-font-weight: 500;
   --form-input-padding: 0.5rem;
   --form-input-border-radius: 6px;
   --form-input-glow: 0 0 0 10px transparent;

war/src/main/less/modules/form.less

@@ -308,7 +308,7 @@
     margin-bottom: 0;
     padding: 0 0 5px 32px;
     cursor: pointer;
-    font-weight: 500;
+    font-weight: var(--form-label-font-weight);
     // remove 300ms pause on mobile
     touch-action: manipulation;
 
@@ -474,7 +474,7 @@
   margin: 0;
   cursor: pointer;
   line-height: 22px;
-  font-weight: 500;
+  font-weight: var(--form-label-font-weight);
 
   &::before {
     content: "";