Update to nam-bellperson v0.26.3-nam.1 #619

Job	Run time
Bitrot check	1m 4s
Test on ubuntu-latest	3m 15s
Test on windows-latest	5m 46s
Test on macOS-latest	2m 48s
Build target wasm32-unknown-unknown	53s
Build target wasm32-wasi	54s
Nightly lint	14s
Lint	51s
Security - Cargo Audit	3m 12s
Intra-doc links	1m 27s
Rustfmt	12s
	20m 36s

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