fix: update placeholder text style (#911)

Author: arjunlalb

projects/components/src/input/input.component.scss

@@ -1,3 +1,4 @@
+@import 'mixins';
 @import 'color-palette';
 
 :host {
@@ -31,6 +32,7 @@
         padding-bottom: 0;
 
         .mat-form-field-label {
+          @include body-1-regular($gray-7);
           padding: 0 0 0 8px;
           line-height: initial;
           color: $gray-5;

projects/components/src/textarea/textarea.component.scss

@@ -40,6 +40,7 @@
       padding-bottom: 0;
 
       .mat-form-field-label {
+        @include body-1-regular($gray-7);
         padding: 0 0 0 8px;
         line-height: initial;
         color: $gray-5;