Update CHANGELOG.md for PR Unstructured-IO#3974

PR Unstructured-IO#3974 - bug fix

Author: Nathan-GoSupply

CHANGELOG.md

@@ -1,3 +1,30 @@
+## 0.17.7
+
+### Enhancements
+
+### Features
+
+### Fixes
+Fix for 'PSSyntaxError' import error:
+"cannot import name 'PSSyntaxError' from 'pdfminer.pdfparser'"
+
+Latest pdfminer-six doesn't import PSSyntaxError into pdfminer.pdfparser anymore. It must now be directly imported from its source (pdfminer.psexceptions)
+
+This change will also work on the older version. In the older version, `pdfminer.pdfparser` imports PSSyntaxError from  `pdfminer.psexceptions`.
+However they have since removed the PSSyntaxError import from `pdfminer.pdfparser`.
+
+Therefore, for the new pdfminer version we must change to directly import from `pdfminer.psexceptions`.
+
+So instead of
+`pdfminer_utils.py` -> `pdfminer.pdfparser` ->`pdfminer.psexceptions`
+
+We can do
+`pdfminer_utils.py` -> `pdfminer.psexceptions`
+
+PSSyntaxError is defined in `pdfminer.psexceptions` in both the old and new versions of pdfminer, so we will still get backward compatibility.
+
+[Here is the commit](https://github.com/pdfminer/pdfminer.six/commit/b9b75ff85877b7cd373539c79014cbde39508969#diff-a0da8fc41f6e21cd3ab62f914df6ce72d433d3222168af458993d911a5dac37c) for the change on pdfminer.
+
 ## 0.17.6-dev1
 
 ### Enhancements