[BUG] 2024 SRD Thunderwave typo in name and key

[kennygoff]

Bug description

The 2024 SRD version of the "Thunderwave" spell is named "Thunderwavea", and the key is srd-2024_thunderwavea.

Steps to Reproduce

Visit https://staging.open5e.com/spells/srd-2024_thunderwavea, note the "a" at the end of the word "Thunderwave" in both the name and url.

[kennygoff]

Oops, this was included in the fix #859 for #857, didn't see that fix included Thunderwave. Closing as dupe!