[Space selector] Fix failing test (#150853)

## Summary

This PR updates the snapshot for `space_selector_test`, so the test can
pass normally. Discrepancy occurred after two PRs changing the
`space_selector` were merged around the same time.
https://github.com/elastic/kibana/pull/150284
https://github.com/elastic/kibana/pull/150503

__Fixes: https://github.com/elastic/kibana/issues/150834__

### Checklist

Delete any items that are not applicable to this PR.

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guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
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~- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials~
- [X] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
~- [ ] Any UI touched in this PR is usable by keyboard only (learn more
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~- [ ] Any UI touched in this PR does not create any new axe failures
(run axe in browser:
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allowlisted in the cloud and added to the [docker
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### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

x-pack/plugins/spaces/public/space_selector/__snapshots__/space_selector.test.tsx.snap

@@ -6,8 +6,9 @@ exports[`it renders with custom logo 1`] = `
   data-test-subj="kibanaSpaceSelector"
   panelled={true}
 >
-  <_EuiPageEmptyPrompt
+  <_EuiPageSection
     className="spcSpaceSelector__pageContent"
+    color="transparent"
   >
     <EuiText
       size="s"
@@ -24,19 +25,19 @@ exports[`it renders with custom logo 1`] = `
       <EuiSpacer
         size="xxl"
       />
-      <h1
-        className="eui spcSpaceSelector__pageHeader"
-        tabIndex={0}
-      >
-        <FormattedMessage
-          defaultMessage="Select your space"
-          id="xpack.spaces.spaceSelector.selectSpacesTitle"
-          values={Object {}}
-        />
-      </h1>
       <EuiTextColor
         color="subdued"
       >
+        <h1
+          className="eui spcSpaceSelector__pageHeader"
+          tabIndex={0}
+        >
+          <FormattedMessage
+            defaultMessage="Select your space"
+            id="xpack.spaces.spaceSelector.selectSpacesTitle"
+            values={Object {}}
+          />
+        </h1>
         <p>
           <FormattedMessage
             defaultMessage="You can change your space at anytime."
@@ -52,7 +53,7 @@ exports[`it renders with custom logo 1`] = `
     <EuiLoadingSpinner
       size="xl"
     />
-  </_EuiPageEmptyPrompt>
+  </_EuiPageSection>
 </_KibanaPageTemplate>
 `;