Fix typos (#11041)

Author: sdwheeler

reference/5.1/Microsoft.PowerShell.Core/About/about_Environment_Variables.md

@@ -321,7 +321,7 @@ The environment variables that store preferences include:
     a value of `Process`.
 
   - Manually set the environment variable. Changing the value of this variable
-    changes the execution policy current process.
+    changes the execution policy of the current process.
 
   This information only applies to the Windows platform. For more information,
   see [about_Execution_Policies][05].
@@ -382,7 +382,7 @@ The environment variables that store preferences include:
   example:
 
   ```powershell
-  # `NUL` here is a special device on Windows that cannot be written to
+  # `NUL` here is a special device on Windows that can't be written to
   $env:PSModuleAnalysisCachePath = 'NUL'
   ```
 

reference/7.2/Microsoft.PowerShell.Core/About/about_Environment_Variables.md

@@ -379,7 +379,7 @@ The environment variables that store preferences include:
     a value of `Process`.
 
   - Manually set the environment variable. Changing the value of this variable
-    changes the execution policy current process.
+    changes the execution policy of the current process.
 
   This information only applies to the Windows platform. For more information,
   see [about_Execution_Policies][05].

reference/7.3/Microsoft.PowerShell.Core/About/about_Environment_Variables.md

@@ -379,7 +379,7 @@ The environment variables that store preferences include:
     a value of `Process`.
 
   - Manually set the environment variable. Changing the value of this variable
-    changes the execution policy current process.
+    changes the execution policy of the current process.
 
   This information only applies to the Windows platform. For more information,
   see [about_Execution_Policies][05].

reference/7.4/Microsoft.PowerShell.Core/About/about_Environment_Variables.md

@@ -379,7 +379,7 @@ The environment variables that store preferences include:
     a value of `Process`.
 
   - Manually set the environment variable. Changing the value of this variable
-    changes the execution policy current process.
+    changes the execution policy of the current process.
 
   This information only applies to the Windows platform. For more information,
   see [about_Execution_Policies][05].

reference/7.5/Microsoft.PowerShell.Core/About/about_Environment_Variables.md

@@ -379,7 +379,7 @@ The environment variables that store preferences include:
     a value of `Process`.
 
   - Manually set the environment variable. Changing the value of this variable
-    changes the execution policy current process.
+    changes the execution policy of the current process.
 
   This information only applies to the Windows platform. For more information,
   see [about_Execution_Policies][05].