Add release notes for v3.29.5

Author: danudey

release-notes/v3.29.5-release-notes.md

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+17 Jul 2025
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+#### Bug fixes
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+- Fix CalicoNodeStatus updates could get blocked by datastore errors [calico 10594](https://github.com/projectcalico/calico/pull/10594) (@theboringstuff)
+- ebpf: Fixed mounting cgroupv2 for connect time load balancing. [calico 10505](https://github.com/projectcalico/calico/pull/10505) (@sridhartigera)
+- ebpf: Fixed attaching bpf programs by atomically replacing the old program rather than attaching new and detaching old. [calico 10455](https://github.com/projectcalico/calico/pull/10455) (@sridhartigera)