Fix CSS flexbox property and formatting issues

Replaces 'justify-content: end' with 'justify-content: flex-end' for proper flexbox alignment and removes extra whitespace in class selector for consistency.

Author: JorchCortez

src/Components/Skills/SkillContainer/SkillContainer.css

@@ -23,7 +23,7 @@
     display: flex;
     flex-direction: row;
     align-items: center;
-    justify-content: end;
+    justify-content: flex-end;
     gap: 0.5rem;
     font-size: 1.5rem;
 }
@@ -76,7 +76,7 @@
     gap: 0.5rem;
 }
 
-.skill-container__level-block { 
+.skill-container__level-block {
     border-radius: 0.25rem;
     overflow: hidden;
     height: 1.25rem;