net: bump `webpki-roots` to `v0.25` #857

Job	Run time
Format	5s
Build WASM (stable, -p nostr)	23s
Build WASM (stable, -p nostr-sdk)	52s
Build WASM (stable, -p nostr-js)	34s
Build WASM (1.64.0, -p nostr)	3m 19s
Build WASM (1.64.0, -p nostr-sdk)	3m 39s
Build WASM (1.64.0, -p nostr-js)	4m 37s
Build (stable, -p nostr)	1m 59s
Build (stable, -p nostr --no-default-features)	29s
Build (stable, -p nostr --no-default-features --features all-nips)	1m 54s
Build (stable, -p nostr --no-default-features --features vanity)	39s
Build (stable, -p nostr --features blocking)	2m 35s
Build (stable, -p nostr-sdk)	2m 20s
Build (stable, -p nostr-sdk --no-default-features)	51s
Build (stable, -p nostr-sdk --features blocking)	1m 56s
Build (stable, -p nostr-ffi)	2m 21s
Build (stable, -p nostr-sdk-ffi)	2m 37s
Build (1.64.0, -p nostr)	4m 58s
Build (1.64.0, -p nostr --no-default-features)	3m 21s
Build (1.64.0, -p nostr --no-default-features --features all-nips)	5m 34s
Build (1.64.0, -p nostr --no-default-features --features vanity)	3m 27s
Build (1.64.0, -p nostr --features blocking)	5m 37s
Build (1.64.0, -p nostr-sdk)	6m 31s
Build (1.64.0, -p nostr-sdk --no-default-features)	4m 24s
Build (1.64.0, -p nostr-sdk --features blocking)	6m 49s
Build (1.64.0, -p nostr-ffi)	4m 53s
Build (1.64.0, -p nostr-sdk-ffi)	6m 54s
	1h 23m 38s

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