Add a new JWT key for local development (#1328)

See opencast/opencast#6092 for more
information. Basically, some keys don't work with Java 17 anymore, and
Java 17 is needed for Opencast 17, so in order to test and develop stuff
with OC17, we needed a new key.
I took the first one that was reported to work in the linked issue. It's
only used for local development. **Do not use in production.**

util/dev-config/jwt-key.pem

@@ -1,5 +1,5 @@
 -----BEGIN PRIVATE KEY-----
-MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgZ7CNR63yKUIqOrTM
-DUABsgDGN/aGGdsaLV93X+DAqMihRANCAAQmGfYZeS+MNwjkRvC0yJupqwTmVd1W
-HkXMjyS6yMOWMdV6g+WrM88L09Wj29JhNEyLqMN4RmROmsLNj6HFUgJt
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg66Zp9DgrYgT6H/dJ
+p3zkos361IC2DJchnd0ArvCFofihRANCAARdWx7zObah63pPdt6WJPy+A9rIjriA
+ImQQfWCJRa37KyytlaSAmpUPLEUeW31fDiwD66yphyCeNHgeFfPD/tw6
 -----END PRIVATE KEY-----