Update DecodeUefiLog ReadMe.md - Simple Typo Fixes (microsoft#199)

## Description

Simple Typo Fixes to ReadMe.md Page for DecodeUefiLog

- [ ] Impacts functionality?
  - **Functionality** - Does the change ultimately impact how firmware functions?
  - Examples: Add a new library, publish a new PPI, update an algorithm, ...
- [ ] Impacts security?
  - **Security** - Does the change have a direct security impact on an application,
    flow, or firmware?
  - Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
- [ ] Breaking change?
  - **Breaking change** - Will anyone consuming this change experience a break
    in build or boot behavior?
  - Examples: Add a new library class, move a module to a different repo, call
    a function in a new library class in a pre-existing module, ...
- [ ] Includes tests?
  - **Tests** - Does the change include any explicit test code?
  - Examples: Unit tests, integration tests, robot tests, ...
- [x] Includes documentation?
  - **Documentation** - Does the change contain explicit documentation additions
    outside direct code modifications (and comments)?
  - Examples: Update readme file, add feature readme file, link to documentation
    on an a separate Web page, ...

## How This Was Tested

Viewed ReadMe.md after the changes were made in my personal fork.

## Integration Instructions

N/A

AdvLoggerPkg/Application/DecodeUefiLog/ReadMe.md

@@ -8,11 +8,11 @@ Advanced Logger stores the debug log file in memory, with additional data for ea
 At runtime, if the Advanced Logger is enabled, this in memory log is available through the UEFI
 Variable store.
 As the log in memory has additional metadata and alignment structure, DecodeUefiLog parses the
-on memory UefiLog to a text stream and writes the decoded log to a local file.
+in memory UefiLog to a text stream and writes the decoded log to a local file.
 
 ## Usage
 
-Copy the two files, DecideUefiLog.py and UefiVariablesSupportLib.py, to the system that has
+Copy the two files, DecodeUefiLog.py and UefiVariablesSupportLib.py, to the system that has
 the Advanced Logger enabled.
 
 The simplest case: