chore(deps): only install ionicons 7.1.0 (#27682)

Issue number: N/A

---------

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## What is the current behavior?
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There is a known bug in a dependency that Stencil uses to process CSS
that causes the build to fail on Ionicons 7.1.1+. Our
`package-lock.json` always installs 7.1.0, but if you remove the package
lock you'll get a newer version of Ionicons that triggers the bug.

## What is the new behavior?
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this PR. -->

- Core installs only ionicons 7.1.0 until the underlying bug is resolved
(tracked internally)

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

core/package.json

@@ -32,7 +32,7 @@
   ],
   "dependencies": {
     "@stencil/core": "^3.4.0",
-    "ionicons": "^7.1.0",
+    "ionicons": "7.1.0",
     "tslib": "^2.1.0"
   },
   "devDependencies": {