Updated database name

Author: amrutprabhu

src/main/resources/application.yaml

@@ -1,6 +1,6 @@
 spring:
   datasource:
-    url: jdbc:mysql://localhost:13306/BOOK_DB?serverTimezone=UTC&cachePrepStmts=true&useServerPrepStmts=true&rewriteBatchedStatements=true
+    url: jdbc:mysql://localhost:13306/book_db?serverTimezone=UTC&cachePrepStmts=true&useServerPrepStmts=true&rewriteBatchedStatements=true
     username: root
     password: zZijbfa64LnL2quYCFyH5jcRn2f3iUNLSrfRwiX3
   jpa: