build(deps): bump fluent/fluent-bit from 3.1.2 to 3.1.3 in /sidecar/fluentbit #1331

Job	Run time
Build tailing sidecar operator	1m 27s
Build otelcol sidecar	1m 31s
Test Helm chart (fluentbit)	3m 59s
markdownlint	33s
Test Helm chart (otelcol)	5m 33s
Test Helm chart with cert-manager (fluentbit)	4m 13s
Test Helm chart with custom configuration (fluentbit)	5m 19s
Test resources created without Helm chart (fluentbit)	4m 28s
Test Helm chart with custom configuration (otelcol)	5m 28s
yamllint	5s
Test Helm chart with cert-manager (otelcol)	4m 59s
Test resources created without Helm chart (otelcol)	6m 5s
	43m 40s

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