MINOR: Bump com.fasterxml.jackson:jackson-bom from 2.18.3 to 2.21.0 (#973)

Bumps
[com.fasterxml.jackson:jackson-bom](https://github.com/FasterXML/jackson-bom)
from 2.18.3 to 2.21.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/901b398ef9e8dfd8595182f149c4f3f78c1c4893"><code>901b398</code></a>
[maven-release-plugin] prepare release jackson-bom-2.21.0</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/86a4b9f9ff15fbef0e275b836d6e55b4ace3e5ee"><code>86a4b9f</code></a>
...</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/6b5de3aca17aa41f97a4c356bacf0525c4ab5751"><code>6b5de3a</code></a>
Prep for 2.21 release</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/3001d78da41c003e05d2cba7e126a854f7d2120a"><code>3001d78</code></a>
Merge pull request <a
href="https://redirect.github.com/FasterXML/jackson-bom/issues/116">#116</a>
from FasterXML/tatu/2.21/115-fix-cyclonedx-backport-i...</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/937029253f1779f9d92ff386f210f1f366414289"><code>9370292</code></a>
makeAggregateBom -&gt; makeBom</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/3e4db580fa7bde99b42cf0bfd292184404245a85"><code>3e4db58</code></a>
Backport <a
href="https://redirect.github.com/FasterXML/jackson-bom/issues/115">#115</a>
in 2.x for 2.21</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/0ce4467b74172d6ff76facd2e67678d1f073530e"><code>0ce4467</code></a>
Merge branch '2.20' into 2.x</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/0dc79f5582788045a837435a588c37a3e079b761"><code>0dc79f5</code></a>
...</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/6a3d76be1d6b3e0549dd5c79ef493b2c2835682d"><code>6a3d76b</code></a>
Merge branch '2.20' into 2.x</li>
<li><a
href="https://github.com/FasterXML/jackson-bom/commit/1d528179d18cf6fea97079361b293b48c3e86719"><code>1d52817</code></a>
Post-release dep version bump</li>
<li>Additional commits viewable in <a
href="https://github.com/FasterXML/jackson-bom/compare/jackson-bom-2.18.3...jackson-bom-2.21.0">compare
view</a></li>
</ul>
</details>
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pom.xml

@@ -100,7 +100,7 @@ under the License.
     <dep.netty-bom.version>4.2.9.Final</dep.netty-bom.version>
     <dep.grpc-bom.version>1.78.0</dep.grpc-bom.version>
     <dep.protobuf-bom.version>4.33.1</dep.protobuf-bom.version>
-    <dep.jackson-bom.version>2.18.3</dep.jackson-bom.version>
+    <dep.jackson-bom.version>2.21.0</dep.jackson-bom.version>
     <dep.hadoop.version>3.4.2</dep.hadoop.version>
     <dep.fbs.version>25.2.10</dep.fbs.version>
     <dep.avro.version>1.12.1</dep.avro.version>