Fix changelog typos

Author: smoelius

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## 1.7.0
 
 - Add note to README.md about why a package could be flagged one day but not the next ([68ce0e0](https://github.com/trailofbits/cargo-unmaintained/commit/68ce0e03285139593d33a5859d85bc8d1146c206))
-- Make verbose printing more informative ([#548](https://github.com/trailofbits/cargo-unmaintained/pull/548))
+- FEATURE: Make verbose printing more informative ([#548](https://github.com/trailofbits/cargo-unmaintained/pull/548))
 
 ## 1.6.3
 
@@ -19,7 +19,7 @@
 
 ## 1.6.0
 
-- Add experimental `--json` option to output JSON ([#464](https://github.com/trailofbits/cargo-unmaintained/pull/464))
+- FEATURE: Add experimental `--json` option to output JSON ([#464](https://github.com/trailofbits/cargo-unmaintained/pull/464))
 
 ## 1.5.1