Fix spelling errors (#846)

Also: change checksums due to filename and content changes, and fix language snippet test output to produce correct error messages

docs/modules/release-notes/pages/0.26.adoc

@@ -12,7 +12,7 @@ This release brings Windows support, improvements to controlling how Pkl talks o
 
 The next release (0.27) is scheduled for October 10th, 2024.
 
-Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[Github]. +
+Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[GitHub]. +
 
 [small]#Pkl is hosted on https://github.com/apple/pkl[GitHub].
 To get started, follow xref:pkl-cli:index.adoc#installation[Installation].#
@@ -460,7 +460,7 @@ To mitigate, the package's version needs to be bumped, even if package contents
 
 == Miscellaneous [small]#🐸#
 
-The following changes have been made that are not new features, nor breaking changes.
+The following changes have been made that are neither new features nor breaking changes.
 
 * Pkl's user-agent header for HTTP requests has been tweaked to add a semicolon (https://github.com/apple/pkl/pull/221[#221]). Here is an example difference:
 +

docs/modules/release-notes/pages/0.27.adoc

@@ -12,7 +12,7 @@ This release brings improvements in typechecking of `Listing` and `Mapping`, the
 
 The next release (0.28) is scheduled for February 2025.
 
-Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[Github]. +
+Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[GitHub]. +
 
 [small]#Pkl is hosted on https://github.com/apple/pkl[GitHub].
 To get started, follow xref:pkl-cli:index.adoc#installation[Installation].#
@@ -121,7 +121,7 @@ A new API has been added to analyze the import graph of Pkl modules (https://git
 This API comes in four forms:
 
 1. A standard library module: `pkl:analyze`
-2. A CLI command: `pkl anaylze imports`
+2. A CLI command: `pkl analyze imports`
 3. A Java API: `org.pkl.core.Analyzer`
 4. A Gradle API: `org.pkl.gradle.task.AnalyzeImportsTask`
 

docs/modules/release-notes/pages/0.28.adoc

@@ -10,7 +10,7 @@ Pkl {version} was released on {release-date}. +
 
 The next release (0.XX) is scheduled for ???..
 
-Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[Github]. +
+Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[GitHub]. +
 
 [small]#Pkl is hosted on https://github.com/apple/pkl[GitHub].
 To get started, follow xref:pkl-cli:index.adoc#installation[Installation].#

docs/modules/release-notes/template.adoc

@@ -12,7 +12,7 @@ XXX
 
 The next release (XXX) is scheduled for XXX (e.g., August 2, 2021).
 
-Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[Github]. +
+Please send feedback and questions to https://github.com/apple/pkl/discussions[GitHub Discussions], or submit an issue on https://github.com/apple/pkl/issues/new[GitHub]. +
 
 [small]#Pkl is hosted on https://github.com/apple/pkl[GitHub].
 To get started, follow xref:pkl-cli:index.adoc#installation[Installation].#