Fix typos and linguistic errors in documentation (#3897)

Author: survivant

HOTFIX_README.md

@@ -33,7 +33,7 @@ correct scale.
 To enable this hotfix, supply a 'hotfixes' array to the options object in the jsPDF constructor function, and add the
 string 'px_scaling' to this array.
 
-#Accepted Hotfixes
+# Accepted Hotfixes
 
 ## scale_text
 
@@ -63,4 +63,4 @@ Filling paths
 ### Description
 
 In certain cases, closing a fill would result in a path resolving to an incorrect point.
-The was most likely fixed when we refactored matrix logic. Enabling this hotfix will ignore a most-likely unneeded workaround.
+This was most likely fixed when we refactored matrix logic. Enabling this hotfix will ignore a most-likely unneeded workaround.

ISSUE_TEMPLATE.md

@@ -2,7 +2,7 @@ Feature requests, bug reports etc. are very welcome as issues. But questions are
 
 If you are facing issues with garbled Unicode characters, please refer to [#2677](https://github.com/MrRio/jsPDF/issues/2677).
 
-Note that new issues should follow these guidelines. Otherwise, the issue will be closed without a comment and tagged with the "Needs Information" label.
+Note that new issues should follow these guidelines. Otherwise, the issue will be closed without comment and tagged with the "Needs Information" label.
 
 1. A bug should be reported as an [mcve](https://stackoverflow.com/help/mcve).
 2. Make sure code is properly indented and [formatted](https://help.github.com/articles/basic-writing-and-formatting-syntax/#quoting-code) (Use ``` around code blocks).