Bump @polkadot/api from 14.3.1 to 15.7.1

Bumps [@polkadot/api](https://github.com/polkadot-js/api/tree/HEAD/packages/api) from 14.3.1 to 15.7.1.
- [Release notes](https://github.com/polkadot-js/api/releases)
- [Changelog](https://github.com/polkadot-js/api/blob/master/CHANGELOG.md)
- [Commits](https://github.com/polkadot-js/api/commits/v15.7.1/packages/api)

---
updated-dependencies:
- dependency-name: "@polkadot/api"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -16,7 +16,7 @@
 	"dependencies": {
 		"@acala-network/chopsticks": "^1.0",
 		"@acala-network/chopsticks-testing": "^1.0",
-		"@polkadot/api": "^15.0",
+		"@polkadot/api": "^15.7",
 		"@swc/core": "^1.10.0",
 		"axios": "^1.7.9",
 		"dotenv": "^16.4.7",

yarn.lock

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   resolution: "@polkadot/api@npm:15.6.1"
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@@ -1261,6 +1332,19 @@ __metadata:
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   resolution: "@polkadot/rpc-core@npm:15.6.1"
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@@ -1299,6 +1397,30 @@ __metadata:
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+    "@polkadot/x-fetch": "npm:^13.4.3"
+    "@polkadot/x-global": "npm:^13.4.3"
+    "@polkadot/x-ws": "npm:^13.4.3"
+    "@substrate/connect": "npm:0.8.11"
+    eventemitter3: "npm:^5.0.1"
+    mock-socket: "npm:^9.3.1"
+    nock: "npm:^13.5.5"
+    tslib: "npm:^2.8.1"
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+  resolution: "@polkadot/types-augment@npm:15.7.2"
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   resolution: "@polkadot/types-codec@npm:15.6.1"
@@ -1322,6 +1456,17 @@ __metadata:
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+"@polkadot/types-codec@npm:15.7.2":
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+  resolution: "@polkadot/types-codec@npm:15.7.2"
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   resolution: "@polkadot/types-create@npm:15.6.1"
@@ -1333,6 +1478,17 @@ __metadata:
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+"@polkadot/types-support@npm:15.7.2":
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+    "@polkadot/util-crypto": "npm:^13.4.3"
+    rxjs: "npm:^7.8.1"
+    tslib: "npm:^2.8.1"
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-    "@polkadot/api": "npm:^15.0"
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