[8.7] [DOCS] Updates text on docs landing page (#152152) (#152931)

# Backport

This will backport the following commits from `main` to `8.7`:
- [[DOCS] Updates text on docs landing page
(#152152)](https://github.com/elastic/kibana/pull/152152)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT
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Updates text on docs landing page (#152152)\n\n## Summary\r\n\r\nThis PR
updates the text in the solutions cards on the docs
landing\r\npage.\r\n\r\n\r\n[Preview](https://kibana_152152.docs-preview.app.elstc.co/guide/en/kibana/master/index.html)","sha":"df620e1d7e45751001b22fbf35a7bba5789ba094","branchLabelMapping":{"^v8.8.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Docs","release_note:skip","v8.6.0","v8.7.0","v8.8.0"],"number":152152,"url":"https://github.com/elastic/kibana/pull/152152","mergeCommit":{"message":"[DOCS]
Updates text on docs landing page (#152152)\n\n## Summary\r\n\r\nThis PR
updates the text in the solutions cards on the docs
landing\r\npage.\r\n\r\n\r\n[Preview](https://kibana_152152.docs-preview.app.elstc.co/guide/en/kibana/master/index.html)","sha":"df620e1d7e45751001b22fbf35a7bba5789ba094"}},"sourceBranch":"main","suggestedTargetBranches":["8.6","8.7"],"targetPullRequestStates":[{"branch":"8.6","label":"v8.6.0","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.7","label":"v8.7.0","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"main","label":"v8.8.0","labelRegex":"^v8.8.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/152152","number":152152,"mergeCommit":{"message":"[DOCS]
Updates text on docs landing page (#152152)\n\n## Summary\r\n\r\nThis PR
updates the text in the solutions cards on the docs
landing\r\npage.\r\n\r\n\r\n[Preview](https://kibana_152152.docs-preview.app.elstc.co/guide/en/kibana/master/index.html)","sha":"df620e1d7e45751001b22fbf35a7bba5789ba094"}}]}]
BACKPORT-->

Co-authored-by: gchaps <33642766+gchaps@users.noreply.github.com>

docs/index-custom-title-page.html

@@ -71,7 +71,7 @@
   </div>
 </div>
 
-<h3>Explore by use case</h3>
+<h3>Explore by Elastic solution</h3>
 
 <div class="row my-4">
   <div class="col-md-4 col-12 mb-2">
@@ -79,7 +79,7 @@
       <div class="card h-100">
         <h4 class="mt-3">
           <span class="inline-block float-left icon mr-2" style="background-image: url('https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/blt11200907c1c033aa/634d9da119d8652169cf9b2b/enterprise-search-logo-color-32px.png');"></span>
-          Search my data
+          Enterprise Search
         </h4>
         <p>Create search experiences for your content, wherever it lives.</p>
       </div>
@@ -90,9 +90,9 @@
       <div class="card h-100">
         <h4 class="mt-3">
           <span class="inline-block float-left icon mr-2" style="background-image: url('https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/bltaa08b370a00bbecc/634d9da14e565f1cdce27f7c/observability-logo-color-32px.png');"></span>
-          Observe my data
+          Observability
         </h4>
-        <p>Follow our guides to monitor logs, metrics, and traces.</p>
+        <p>Learn how to monitor logs, metrics, and traces.</p>
       </div>
     </a>
   </div>
@@ -101,7 +101,7 @@
       <div class="card h-100">
         <h4 class="mt-3">
           <span class="inline-block float-left icon mr-2" style="background-image: url('https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/blt5e0e0ad9a13e6b8c/634d9da18473831f96bbdf1e/security-logo-color-32px.png');"></span>
-          Protect my environment
+          Security
         </h4>
         <p>Learn how to defend against threats across your environment.</p>
       </div>