docs: update changelog for v0.26.1 #5

Job	Run time
default-checks / test	10m 40s
default-checks / test	54s
default-checks / build	2m 8s
default-checks / build	17s
default-checks / validate-internal-testnet-genesis	46s
default-checks / validate-internal-testnet-genesis	33s
default-checks / validate-protonet-genesis	1m 55s
default-checks / validate-protonet-genesis	22s
lint-checks / golangci-lint	2m 24s
lint-checks / golangci-lint	35s
lint-checks / proto-lint / Check Proto	53s
lint-checks / proto-lint / Check Proto	52s
get-version-tag	0s
get-version-tag	1s
docker	0s
docker	1s
	22m 21s

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