Bump actions/attest-build-provenance from 2.0.1 to 2.1.0 #1226

Job	Run time
0️⃣ Kill previous runs	8s
1️⃣ PHP 8.2 - Syntax errors	34s
2️⃣ PHP 8.2 - Code Style errors	46s
2️⃣ PHP 8.2 - PHPStan	1m 12s
2️⃣ JS front-end / Node 20	40s
2️⃣ PHP tests / 8.3 - mariadb -- Unit,Feature_v2	4m 55s
2️⃣ PHP tests / 8.3 - postgresql -- Unit,Feature_v2	4m 35s
2️⃣ PHP tests / 8.3 - sqlite -- Unit,Feature_v2	4m 30s
3️⃣ PHP dist / 8.2 - mariadb	1m 45s
3️⃣ PHP dist / 8.2 - postgresql	1m 34s
3️⃣ PHP dist / 8.2 - sqlite	1m 45s
4️⃣ Build Artifact	0s
	22m 24s

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