fix: update translation examples and modify header link color

Author: dfl-aeb

app/frontend/src/locales/en/translation.json

@@ -44,10 +44,10 @@
     },
     "askTitle": "Ask your data",
     "gpt4vExamples": {
-        "1": "Compare the impact of interest rates and GDP in financial markets.",
-        "2": "What is the expected trend for the S&P 500 index over the next five years? Compare it to the past S&P 500 performance",
+        "1": "Compare the impact of interest rates and GDP on financial markets.",
+        "2": "What is the expected trend for the S&P 500 index over the next five years? Compare it to the past performance of the S&P 500.",
         "3": "Can you identify any correlation between oil prices and stock market trends?",
-        "placeholder": "Example: Does my plan cover annual eye exams?"
+        "placeholder": "Example: Does our Helm Chart configuration allow specifying StatefulSets?"
     },
     "generatingAnswer": "Generating answer",
     "citationWithColon": "Citation:",

app/frontend/src/pages/layout/Layout.module.css

@@ -149,7 +149,7 @@
     }
 
     .headerNavPageLinkActive {
-        color: #f2f2f2;
+        /* color: #f2f2f2; */
         text-decoration: none;
     }