Set the correct burn rate for Cere's runtime (#273)

### Description
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### Types of Changes
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- [ ] Tech Debt (Code improvements)
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Dependency upgrade (A change in substrate or any 3rd party crate
version)

### Migrations and Hooks
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- [ ] This change requires a runtime migration.
- [ ] Modifies `on_initialize`
- [ ] Modifies `on_finalize`

### Checklist
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requiring PR review -->
- [x] Change has been tested locally.
- [ ] Change adds / updates tests.
- [ ] Changelog doc updated.

runtime/cere-dev/src/lib.rs

@@ -907,6 +907,7 @@ parameter_types! {
 	pub const ProposalBond: Permill = Permill::from_percent(5);
 	pub const ProposalBondMinimum: Balance = 50_000 * DOLLARS;
 	pub const SpendPeriod: BlockNumber = DAYS;
+	/// Burn rate is at 0.058% per era (daily burn rate)
 	pub const Burn: Permill = Permill::from_parts(580);
 	pub const TipCountdown: BlockNumber = DAYS;
 	pub const TipFindersFee: Percent = Percent::from_percent(20);

runtime/cere/src/lib.rs

@@ -911,7 +911,8 @@ parameter_types! {
 	pub const ProposalBond: Permill = Permill::from_percent(5);
 	pub const ProposalBondMinimum: Balance = 50_000 * DOLLARS;
 	pub const SpendPeriod: BlockNumber = DAYS;
-	pub const Burn: Permill = Permill::from_percent(580);
+	/// Burn rate is at 0.058% per era (daily burn rate)
+	pub const Burn: Permill = Permill::from_parts(580);
 	pub const TipCountdown: BlockNumber = DAYS;
 	pub const TipFindersFee: Percent = Percent::from_percent(20);
 	pub const TipReportDepositBase: Balance = 50_000 * DOLLARS;