Fix section title levels in the following files:

• modules/sbo-advanced-binding-options.adoc: line 10: section title out of sequence: expected level 2, got level 3
• modules/sbo-advanced-binding-options.adoc: line 66: section title out of sequence: expected level 2, got level 3
• modules/sbo-binding-workloads-that-are-not-compliant-with-PodSpec.adoc: line 14: section title out of sequence: expected level 2, got level 3
• modules/sbo-binding-workloads-that-are-not-compliant-with-PodSpec.adoc: line 98: section title out of sequence: expected level 2, got level 3