Bump org.assertj:assertj-core from 3.26.0 to 3.26.3 in /devtools/gradle #436

Job	Run time
CI Sanity Check	31s
Attach pull request number	2s
Initial JDK 17 Build	15m 23s
Calculate Test Jobs	8s
Gradle Tests - JDK 17	28m 57s
Maven Tests - JDK ${{ matrix.java.name }}	0s
Gradle Tests - JDK 17 Windows	48m 2s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17	7m 48s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 21	9m 25s
Quickstarts Compilation - JDK 17	6m 10s
JVM Tests - JDK 17 Windows	10m 41s
Native Tests - Misc4	17m 28s
MicroProfile TCKs Tests	0s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Upload build stats to collector	0s
Build report	27s
	2h 25m 2s

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